It was about 600 years ago ______the first clock with a face and an hour hand was made .
| A． that | B．until | C．before | D．when |
When we were young, every evening my brother and I ______ stay at home waiting for our mother.
| A．would | B．might | C．should | D．could |
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 |