I have many friends, some are businessmen.
| A．of them | B．from which | C．who of | D．of whom |
Many experts agree that there is a possibility___ in this area in the following days.
| A．when some more earthquakes may happen |
| B．that some more earthquakes may happen |
| C．where may some more earthquakes happen |
| D．what may some more earthquakes happen |
He went on talking while I tried to ______ what it meant.
| A．come out | B．set out | C．take out | D．figure out |
—Your mother becomes more and more forgetful.
—Yes. She searched for her cellphone for a whole day last Sunday but it ______ in her coat pocket the next day.
| A．turned out | B．turned on | C．turned over | D．turned up |
.--Your parents were anxious about you. You _____ home without saying a word.
-- It’s my fault.
| A．mustn’t be | B．shouldn’t have left |
| C．needn’t have left | D．couldn’t have left |
Hello! I ________ you _______ in London. How long have you been here?
| A．don’t know, were | B．hadn’t known ,are |
| C．haven’t known ,are | D．didn’t know, were |