问题

I rang you at about ten, but there was no reply.— Oh, that was probably ____ I was seeing the doctor

A:when
B:why
C:what
D:that

正确答案是：

同类题型

If you don’t resist smoking heavily likethat , you will have to suffer the _______sooner or later .

We laugh at jokes, but seldom _____ about how they work.

________ too early to the foreign language study, according to some experts, may lead to some unfavorable outcomes.

Everyone in my class passed the exam. — Oh, really? It _____difficult. [ ]

下列各组句子中加点的词语，解释有误的一项是（）