I wonder why Jack always gets good marks when he does only the others.A. half as much asB

问题补充：

I wonder why Jack always gets good marks when he does only the others.

A. half as much as

B. as much as half

C. half as many as

D. as many as half

答案：

(答案→)A. half as much as

B. as much as half

C. half as many as

D. as many as half

解析：考查倍数的表达：倍数+as+ad+as…,这里倍数是half，句意是：我想知道杰克为什么做的是别人的一半，怎么能得这么好的分数。可知是别人一半的工作，是不可数的，用much，选A。