将题后的单词转换为适当的词性，填入空格内.
1 My (   ) about his health was never answered.   inquire

2 The children were full of (   ) about their food.   complain
 
3 Soldiers act in (   ) to the orders of their superior officers.   obey

4 The twins were so much alike that it was impossible to (   ) one from the other.   distinction

5 (   ) of the body to strong sunlight may be harmful.    expose

答案:
1 inquiry
没有人回答我对他健康的询问.

2 complaints
孩子们对他们的食物充满了抱怨.

3 obedience
士兵的行为遵守了他们上级的命令.

4 distinguis
这对双胞胎如此相像以至于不可能区分一个和另一个.

5 Exposure
在强烈的阳光下暴露身体可能会受伤.

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