问题
单项选择题
自来水中的消毒剂是（）。
A.氧气
B.漂白粉
C.石灰
D.以上都不是
答案
参考答案：B
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自来水中的消毒剂是（）。
A.氧气
B.漂白粉
C.石灰
D.以上都不是
参考答案：B
| 词形变换：选择方框里的词的正确形式填空，每词只用一次。 | |
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. |