1. The professor said he could talk on _____ interested the audience.

A. any topic             B. which topic              C. whichever topic        D. the topic he thought it

2. Under no circumstance _____ to tell lies to parents.

 A. children are allowed                          B. are children allowed

 C. children will allow                                   D. will children allow

3. Modern science and technology has _____ communication between people far apart.

 A. made convenient                               B. made it convenient

 C. made it convenient for                       D. made it convenient to

 參考答案及解析：

1. C。whichever已失去疑問含義，等于 anything that，表示強(qiáng)調(diào)；而 which topic中 which保留疑問含義，譯成“哪一個(gè)題目”，不符合句意。而A項(xiàng)和D項(xiàng)中缺少連詞。故答案為C。

2. B。含有否定意義的副詞及介詞短語放在句首時(shí)，句子中主語和謂語用部分倒裝。故答案為B。

3. A。題目中has made是謂語，communication between people far apart是賓語，convenient是賓語的補(bǔ)語，被前置。如用B項(xiàng)，it是形式賓語，后面應(yīng)跟不定式或從句。故答案為A。