—Who left the door open?
— Oh, sorry. I _____ the door.
A.ought to lock B.should lock C.ought to have locked D.could lock
The traffic problems we are looking forward to ______ solved should have attracted the government’s attention.
A. see B. seen C. be seen D. seeing
He seemed to be looking for the words ____ he could express his idea.
A.for which B. with which C. in whom D. in that
A modern city has been set up in ____ was a wasteland ten years ago.
A.what B. which C. that D.where
To make members of a team perform better, the trainer first of all has to know their ____ and weaknesses.
A.strengths B. benefits C. techniques D.values
In the new century, we still should _____ primary importance to the development of economy.
A.perform B. attack C.seek D. attach
