-Mary didn't turn up last time, did she?
-No. She __________. We had changed our plan.
| A．didn't need to come |
| B．needn't have come |
| C．shouldn't have come |
| D．needn't have to come |
The media can often help solve problems and draw attention to situations ______ help is needed.
| A．when | B．how | C．which | D．where |
She ______ his number in the phone book to make sure that she had got it right.
| A．looked up | B．looked for | C．picked out | D．picked up |
I think physics is ________ and difficult ________.
| A．confused; to learn | B．confusing; to be learned |
| C．confused; to learn it | D．confusing; to learn |
An oil tanker hit a rock ______ the northwest coast of Alaska.
| A．on | B．in | C．off | D．to |
. Although he has taken a lot of medicine, his health _______ poor.
| A．proves | B．remains | C．continues | D．becomes |