根据句意填入一个适当的词：

They have sent ________ several spaceships this year.

根据句意填入一个适当的词：

We had to work for hours to stop the ship ________ going down.

根据句意填入一个适当的词：

________ usual, the police went to help the passengers at the station yesterday.

根据句意填入一个适当的词：

The big box is ________ heavy to carry.

根据句意填入一个适当的词：

________ the way, Lucy called you a moment ago.

根据句意填入一个适当的词：

You should think ________ why he came back so late.

选择合适的词填空：

You can borrow the book ________ the library. (of, to, from)

Many foreigners enjoy ________ (live)in China.

根据句意用反义词填空：

When the light is green, it's safe to cross the street. When the light is red, it's ________.

根据句意用反义词填空：

You must remember to ________ rice. Don't waste.