She ____ to her hometown several times.

He found his book this morning, but now he _____ his pen.

The scientist _____ Canada and he will give us a talk when he _____ back.

It was not long before the water _____ cold.

You ought to _______ us with rice and dishes of vegetables, but you didn't.

Since the mid-1980's, growing numbers of Asians __   _ in New Zealand, and they ___about six percent of the total population．

By the time he realizes he _____ into a trap, it'll be late for him to do anything about it．

E-mail, as well as telephones, ______ an important part in daily communication.

This machine _______. It hasn’t worked for years. 

The girl is seriously ill，otherwise she      working instead of staying in bed all day long．