—Shall we invite Tim? —No, it’s too late to invite any more people. _____, he hates parties, you know.

Scientists say it may be five or six years （ ） this medicine is tested on human beings.

By the end of this term, we （ ） 3000 English words in all.

It’s vital that enough money_____collected to get the project started.

_____, the professor is still trying to learn a new language.

_____ breaks the law will be punished sooner or later.

The two boys had so _____ in common that they soon became good friends.

Such problems （ ） air pollution and traffic jams are becoming more and more serious in some big cities.

From her conversation, I_____that she had a large family.

I advise them to withdraw （ ）.

Her （ ） to the job left her with very little free time．

If I had remembered （ ） the window, the thief would not have got in.