问题
选择题
I can't figure out ________ it is that makes him so difficult at school.
A.how
B.what
C.why
D.which
答案
答案:B
B 考察强调句型和宾语从句的语序。What it be that强调句式中的强调的是主语,首先要排除how,why,又因为预计中的主语是泛指意义,排除which,有范围。故使用what。