It’s high time we _____ strict measures to stop pollution.

Many young people find it harder to appreciate_____music than pop music.

The defense computers calculate way to （ ） the enemy missiles.

In the swamp the army （ ） by mosquitoes.

Without your instruction, I （ ） such great progress.

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

She heard a terrible noise, （ ） brought her heart into her mouth.

The shy girl felt quite （ ） and uncomfortable when she could not answer the interviewer’s question.

Each car sold in this specialized shop comes with a one-year （ ）.

Such a skilled tennis player knows how to take_____of his opponent’s (对手) chief weakness.

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

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