It is not always easy for the public to see _____ use a new invention can be of to human life.
He looked around and caught a man _____ his hand into the pocket of a passenger.
Don’t leave the water ____ while you brush your teeth.
_____ and out of breath, we reached the top of the mountain and stopped _____ the beautiful scenery.
I don’t know whether you happen ____ it, but I’m going to study in the U.S.A. this September. A. to be heard B. to be hearing C. to hear D. to have heard
“Do you have anything more ______, sir?” “No. You can have a rest or do something else.”