Question

The difficulty is ________ we haven't so many workers.

1. A.
   which
2. B.
   that
3. C.
   what
4. D.
   why

Answer 1

B
解析：本题考查表语从句的引导词。从所给的选项看，四个词都可以引导表语从句，但表语从句为陈述句语序，只能用that引导。故本题正确答案为B。which，what，why都用于引导表示疑问的从句。题意为：困难在于我们没有这么多工人。