教

学

流

程

析：than后实际上是一个比较状语从句的省略式，其完整形式是than they are commonly supposed.所以答案为B.

2. We won't give up_____ we should fail ten times.

A. even if B. since C. whether D. until

析：观察题干，空白处应填一表"即使"之意的词，故应选A.

3.－What was the party like?

－Wonderful. It's years_____I enjoyed myself so much.

A. after B. when C. before D. since

析：答话者既然说 "Wonderful",那么后面的话必然是对此作进一步的补充说明，只有选Ｄ项才能表达"我多年未曾这么开心过了"意思。注意这儿的since从句中谓语动词enjoyed是延续动词，该句相当于I haven't enjoyed myself so much for years.

4. John plays football_____, if not better than David.

A. as well B. as well as C. so well D. so well as

析：if not better than是插入语，可将其撇开，这时空白处要填as well as才能与David相连接，D项在此不可用(so...as只能用于否定句)。A、C两项皆少as，故答案为B。

Step 5 homework

Exercise book