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

I can’t find my keys! Can you help me （ ） them?

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

I stayed up all night _____ to find a new solution to the problem.

（ ） the past year as an exchange student in Hong Kong, Linda appears more mature than those of her age.

We mention the importance of giving up smoking once and again, but hardly ______ it.

The girls （ ） a pizza and two drinks and took them to a dining table.

The government cannot operate effectively （ ） it is free from such interference.

Mary likes classical music _____ her brother likes pop music.

The twin sisters look so much alike that I could never tell _____.

Air pollution is obviously one of the major _____ of city life.

（ ） five hundred people are believed to have drowned.