1. as+形容词/副词原级+as

(12)A typhoon swept across tiffs area with heavy rains and winds _____ strong as 113 miles per hour.

A. too B. very

C. so D. as

解析：as…as固定搭配。答案是D.

(13)John is the tallest boy in the class, ________ according to himself.

A. five foot eight as tall as B. as tall as five foot eight

C. as five foot eight tall as D. as tall five foot eight as

解析：as tall as five foot eight = as tall as five feet eight inches高达五英尺八英寸。答案是B.

(14)John plays football________, if not better than, David.

A. as well B. as well as

C. so well D. so well as

解析：句意是："John踢足球不比David更好，也会和他一样好。"从结构上看，去掉插入语if not better than，就更清楚地知道用as well as，肯定句中不用so…as.答案是B.

2. not as/so+原级+as

(15) He speaks English well indeed, but of course not ______a native speaker.

A. as fluent as B. more fluent than

C. so fluently as D. much fluently than

解析：修饰动词speaks要用副词，排除A和B;又因than前必须是比较级，排除D;只有选项C正确。

(16)-Do you have a big library?"

No, we don't─at least, not ________yours.

A. bigger as B. as big as

C. as big than D. as bigger than

解析：由语境可知，是要表达"至少没有你们的图书馆那么大"，表示"不如"是"not as+原级+as".答案是B.

3. as +形容词+(a/an+)名词+as

(17)Our neighbour has ______ ours.

A. as a big house as B. as big a house as

C. the same big house as D. a house the same big as

解析：由句式结构判断，选B.

(18)It is generally believed that teaching is ________it is a science.

A. an art much as B. much an art as

C. as an art much as D. as much an art as

解析：由固定搭配"as+形容词+[(a/an+)名词]+as"可排除选项A，B和C.答案是D.

4. 比较级，A or B?

(18)Which do you think tastes________, the chicken or the fish?

A. well B. good C. better D. best

解析：两者之间比较，要用比较级。答案是C.