问题

The light in his office is still on. Do you know __________—To prepare for the mid-term exam.

A:if he works hard
B:why he keeps working
C:why is he so busy
D:when he will stop working;

正确答案是：

同类题型

There _____________ more trees if we all take care of our environment.

_______yourbrother

What do you think about the idea?—I am really against _________ a running race in thestreet.

________he visited, he wasted no time hearing farmers’ voices at home and in the fields

If the shop _____ soon, we won’t buy this kind of shoesShall we go shopping this afternoon? —OK, can’t agree more