What are some of the problems caused by chemical fertilizers? First, they damage the land l_____ killing
the helpful bacteria and pests as well as the harmful ones. Chemicals also stay in the ground and underground
water for a long time. This affects crops and, 2_____, animals and humans, 3_____ chemicals get inside the
crops and cannot just be washed 4_____. These chemicals in the food supply build 5_____ in people's bodies
over time. Many of these chemicals can lead 6_____ cancer or other illnesses. 7_____ addition, fruit, vegetables
and other food grown with chemical fertilizers usually grow 8_____ fast to be full of much nutrition. They
may look beautiful, 9_____ inside there is usually more water than vitamins and minerals.
     10_____ these discoveries, some farmers and many customers are beginnng to tum to organic farming.
Organic farming is simply farming 11_____ using any chemicals. They focus 12_____ keeping their soil rich
and free of disease. A healthy soil reduces disease and helps crops grow strong and healthy. Organic farmers,
therefore, often prefer using natural waste 13_____ animals as fertilizer. They feel that this makes the soil in
their fields 14_____ in minerals and so more fertile. This also keeps the air, soil, water and crops 15_____
from chemicals.

1. You'll find your colleagues very ______ you, so you may be able to concentrate on photography later if
     you're interested.
2. A footballer was ______ taking money for deliberately not scoring goals so as to let the other team win.
3. We went to interview him. He ______ taking money but we were skeptical.
4. My first assignment was as an assistant to a famous fashion photographer, who was going to take photos
    of a model ______ Wang Li.
5. She was lying in her front garden ______. Her hands had almost been cut off.
6. He slowed the bleeding by ______ the wounds until the police and ambulance arrived.
7. The tree was planted near the church fifty years ago, but it is only in recent years that it has ______.
8. Since then, he has ______. As soon as he opens the gate from the outside, he comes into the garden and 
    waits until the gate shuts.
9. Yesterday my husband removed the gate and Rex ______ we have not seen him since.
10. The moment you leave this tent, you'll get ______.

  ①by the end of到……末为止,多和______ 时态 连用.
  ②We____(learn) 500 words by the end of lastmonth.
  ③We____(learn) 800 words by the end of nextmonth.
  ④in the end____(单独作状语)
  ⑤Tom gave in to his wife in the end.
    译:___________________________

1. a number of_______
2. the number of_________
3. A number of students in this school____(come) from England.
4. The number of the students present at the meeting ____  (be) 50.

1. Tom____English.
     汤姆精通英语.
2. All the teachers are requested____  the meeting. 
    所有老师被要求出席会议.
 3.  _________the police officer,he got out of the car.
      在警察的要求下,他下了车.
 4. The bus will stop anywhere____.
     公共汽车会应人请求随处停车.