What would happen if you tried to blow a soap bubble in freezing weather? Would it freeze solid(固体) and fall to the ground? Would you have to hit it to break it? These questions happened to me on a cold winter day. It was too cold to play in the snow, but it was a perfect time to experiment with blowing frozen bubbles.

To blow frozen bubbles, I used dishwashing soap and a drop of glycerin（甘油） to make it even better. I chose a place out of the wind, and blew bubbles the same way I always do. I watched to see what would happen. Here’s what I learned.

If the temperature is low enough, the skin of the bubbles frosts over (结霜), becoming cloudy instead of clear. And what about those rainbow swirls（旋转） you see in soap bubbles? The rainbow colors stay even when the bubbles frost, but they don’t swirl anymore. The bubbles still stay in the air. They don’t fall to the ground any faster than they would on a warm summer day.

When these frozen bubbles break, they don’t turn into small water drops as summer bubbles do. They turn into flashing rainbow confetti（碎屑） and move slowly to the ground. Sometimes a frozen bubble will roll across the snow without breaking. If nothing disturbs the bubble, it may stay there for a long time. Sometimes I could catch a bubble and hold it until the heat of my hand made it pop.

I learned another thing about blowing frozen bubbles. It’s so interesting that I want to try it again next year.

1.It is the perfect time to blow frozen bubbles on a ___________day.

A．cold winter        B．warm spring        C．hot summer        D．sunny autumn

2.When the frozen bubbles break, _________.

A．they make a big sound                   B．they turn into small drops

C．they fall to the ground like rain             D．they become rainbow confetti

3.The purpose of the passage is _______.

A．to learn how to do a science experiment

B．to show the experiment of blowing frozen bubbles

C．to discover games that are fun to play in the snow

D．to invent a new kind of soap that makes stronger bubbles

 

Rita stepped into the cool, moving water. She pushed a black inner tube(内胎) in front of her. She had a worried look on her face because she had never floated down a river before.
“Let me hold your tube while you climb on,” said her father. He smiled at her. “There’s not a cloud in the sky. It’s a great day to be in the river, isn’t it?”
Rita looked out across the water. People were floating by on tubes. Some talked and laughed as they floated easily down the river. Others leaned(倚靠) back with hats pulled over their faces. None of them looked terrified.
“We’ll stay together,” said Rita’s father. “I’ll hold on to your rope(绳子).”
“Will we go very fast?” Rita asked.
“No,” said Dad. “We’ll move slowly for a while, and then it will get a little faster near the river’s bend(拐弯). Don’t worry, Rita. You’ll be fine.”
Rita looked at her tube. It gently(轻轻地) moved up and down in the water. She saw a girl of her own age float by. The girl seemed to be having fun. Suddenly Rita’s worries disappeared（消失）.
“I’m ready to climb on and ride, Dad,” she said.
【小题1】The underlined word “floated” in the reading means “________”.

A．划船

B．乘坐

C．漂浮

D．移动

【小题2】What is Rita’s problem in this story?   

A．She doesn’t like to be in cool water.

B．She is worried that she will get sunburned (晒伤的).

C．She is afraid to try something new.

D．She is afraid of boating.

【小题3】What’s the weather like in the story? 

A．Cloudy.

B．Rainy.

C．Windy.

D．Sunny.

【小题4】Which of these happened last in the story?  

A．Rita pushed her black tube.	B．Rita saw a girl of her own age.
C．Rita stepped into the water.	D．Rita looked worried.

【小题5】What’s the best title for this passage?

A．Rita’s Ride.

B．Rita’s Trip.

C．Rita’s Visit.

D．Rita’s Tube.

Rita stepped into the cool, moving water. She pushed a black inner tube(内胎) in front of her. She had a worried look on her face because she had never floated down a river before.
“Let me hold your tube while you climb on,” said her father. He smiled at her. “There’s not a cloud in the sky. It’s a great day to be in the river, isn’t it?”
Rita looked out across the water. People were floating by on tubes. Some talked and laughed as they floated easily down the river. Others leaned(倚靠) back with hats pulled over their faces. None of them looked terrified.
“We’ll stay together,” said Rita’s father. “I’ll hold on to your rope(绳子).”
“Will we go very fast?” Rita asked.
“No,” said Dad. “We’ll move slowly for a while, and then it will get a little faster near the river’s bend(拐弯). Don’t worry, Rita. You’ll be fine.”
Rita looked at her tube. It gently(轻轻地) moved up and down in the water. She saw a girl of her own age float by. The girl seemed to be having fun. Suddenly Rita’s worries disappeared（消失）.
“I’m ready to climb on and ride, Dad,” she said.
【小题1】The underlined word “floated” in the reading means “________”.

A．划船

B．乘坐

C．漂浮

D．移动

【小题2】What is Rita’s problem in this story?   

A．She doesn’t like to be in cool water.

B．She is worried that she will get sunburned (晒伤的).

C．She is afraid to try something new.

D．She is afraid of boating.

【小题3】What’s the weather like in the story? 

A．Cloudy.

B．Rainy.

C．Windy.

D．Sunny.

【小题4】Which of these happened last in the story?  

A．Rita pushed her black tube.	B．Rita saw a girl of her own age.
C．Rita stepped into the water.	D．Rita looked worried.

【小题5】What’s the best title for this passage?

A．Rita’s Ride.

B．Rita’s Trip.

C．Rita’s Visit.

D．Rita’s Tube.