问题

I can’t understand ____________ the boy alone.

A:why did she leave
B:why had she left
C:why she left
D:why she had left;

正确答案是：

同类题型

ot a bit of headacheIt’s nothing much, ______

hen the school was over, all thestudents scattered _____.

_____ an A on your term paper,but you quoted a little bit more from others’ papers.

Your father’s father is your _____.

Wow! Jerry got full marks again! How lucky he is! — Not exactly! _____. He makes full use of his time to study.[ ]