问题

Tom says he is too tired to go on.—He can’t be.He ____for an hour.

A:just worked
B:has only been working
C:has just worked
D:had only been working

正确答案是：

同类题型

ed his family, but seldom_______ spend much time with them

great surprise, we got _____ people to attendthe conference as we expected

The present question is ____ many students consider itimpossible ____ is really possible if effort is made.

“Everybody is playing basketball outside. Can I join them, Dad ”“_____________, you must finish your homework first. ”

We’d better discuss everything ______before we work out the plan.