36. —Was the guest’s speech interesting?—Not at all. He was at a ______ and didn’t know what to say when others asked him questions.
_____ the diamond, he had to look for a place to hide it.
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