The force is strong enough ________ the water.

1. A.
   hold
2. B.
   holding
3. C.
   to hold
4. D.
   holds

[　　]

词形变换：选择方框里的词的正确形式填空，每词只用一次。（10分）

1. We ________ a science experiment in class tomorrow.

2. Do you know who ________ America?

3. They will show us a ________ experiment in class.

4. I have nothing ________ to my letter.

5. Air is ________ than we think.

6. The force is strong enough ________ the water.

7. I will ask the class to make ________ and guess what will happen.

8. An Easter egg hunt is a game for ________ eggs.

9. To make a candle ________, you “light” it.

10. When the candle stops burning, it ________ up all the oxygen in the air.

词形变换：选择方框里的词的正确形式填空，每词只用一次。（10分）

1. We ________ a science experiment in class tomorrow.

2. Do you know who ________ America?

3. They will show us a ________ experiment in class.

4. I have nothing ________ to my letter.

5. Air is ________ than we think.

6. The force is strong enough ________ the water.

7. I will ask the class to make ________ and guess what will happen.

8. An Easter egg hunt is a game for ________ eggs.

9. To make a candle ________, you “light” it.

10. When the candle stops burning, it ________ up all the oxygen in the air.