William suggested _____ a party for Elizabeth who was going to retire soon.

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

—Where are the children? The dinner’s going to be completely ruined. —I wish they （ ） always late.

We’re talking about the piano and the pianist （ ） were in the concert we attended last night.

（ ） the obvious differences in size and population, the states of America have many things （ ） common.

Many people prefer the bowls made of steel to the______ made of plastic.

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

Do you mean this is the_____decision you have made after thinking for hours?

They didn’t come to the party， though they （ ） that they would.

I used to smoke _____ but I gave it up 3 years ago.

The chemical factory was torn down （ ） protecting the environment.

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