Many students thought about the third question for quite a while and had great difficulty answering it. Obviously, it was _____ all.

We don’t doubt _____ he can do a good job， concerning his experience.

Space vehicles were launched into outer space_____search of another living planet.

You （ ） read the article if you don’t want to.

From her conversation, I_____that she had a large family.

（ ） he often forgot their wedding anniversary greatly annoyed his wife.

My university lies in the north of the city, around （ ） high mountains.

I recognized John （ ） he entered the room.

You needn’t introduce him to me. I’ve met him on several _____.

—Professor Wang, must I hand in the paper this week? —No,（ ） . You can hand it in next week.

She insisted that the seats in the theater （ ） in advance to insure a better view．

It was in the factory （ ） you worked five years ago （ ） you learned the technique.