1. There is a real possibility that these animals could be frightened,__1__a sudden loud noise.

A. being there B. should there be C. there was D. there have been

2. Bit by bit , a child makes the necessary changes to make his language__2__.

A. as other people B. as other people's C. like other people D. like other people

3. Clothing made of plastic fibres has certain advantages over__3__made of natural fibres like cotton, wool, or silk.

A. one B. the one C. that D. what

4. The treasury issued an order stating that__4__land purchased from the government had to be paid for in gold and silver.

A. henceforth B. moreover C. whereby D. however

5. The students expected there__5__more reviewing classes before the final exams.

A. is B. being C. have been D. to be

答案：

1. B) 【句意】 如果突然出现巨大的噪音，这些动物真的有可能受到惊吓。

【难点】 该句是一个省略if的倒装的虚拟条件句，可还原为“if there s hould be...”。

2. D) 【句意】 一点一点地，儿童就会将自己的语言作些必要的修改，而使之与他人的语言相像。

【难点】 as和like都可以表示“像…一样”，但as是连词，后跟从句，like是介词，后跟名词或名词性短语。

3. C) 【句意】 用塑料纤维制成的衣服比用棉花、羊毛或丝绸等天然纤维制成的衣服有些优势。

【难点】 clothing是衣服、被褥的总称，不能用one或the one来指代。what相当于“先行词+that”，后边要接从句。所以只能用that指代clothing。

4. A) 【句意】 财政部发布命令，从即日起，向政府购买土地须以金、银支付。

【难点】 henceforth意为“从今以后”，符合题意要求。

5. D) 【句意】 学生们期望期末考试前能有更多的复习课。

【难点】 动词expect后必须接动词不定式作其宾语，因此，只有D)为正确。