问题
选择题
______ they are most interested in is ______ they can produce more and better
cars.
A．That;how
B．What;how
C．What;what
D．That;that
答案
B。
is前面是一个主语从句，要表达“他们最感兴趣的（东西）”这一意思，只
能选what填入空白;is是表语从句，显然只有选how才能表达“如何生产更多更好的汽车”。