was it because of his

Question

-Was it because of his laziness_______ he didn't do the experiment successfully？
-No，it was because of his carelessness．（　　）

A. that

B. while

C. for

D. as

Answer 1

答案：A
此题考查强调句的一般疑问句．其结构是：Is/Was+it+被强调部分+that/who+句子剩余部分？强调人时，用who，其它用that．此处强调原因．故选A项．