Who do you think is the man you are going to turn for help when you are ?
| A．who; in danger | B．to whom; in trouble | C．with whom; in danger | D．for whom; in trouble |
_______to reach them on the phone, we sent an email instead.
| A．Fail | B．Failed | C．To fail | D．Having failed |
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
He looked around and caught a man _____ his hand into the pocket of a passenger.
| A．put | B．to be put | C．to put | D．putting |
Don’t leave the water ____ while you brush your teeth.
| A．run | B．running | C．being run | D．to run |
Having been ill in bed for nearly a month ,he had a hard time________ the exam.
| A．pass | B．to pass | C．passed | D．passing |