.
I soon found that the work I was doing had already been done by someone else - ________, I was wasting my time.
| A．in a word | B．in all | C．in other words | D．in words |
A new notice should be put up to __________ the unwanted visitors __________.
| A．keep; in |
| B．keep; on |
| C．keep; up |
| D．keep; out |
—Look! Jessica is coming!
—It __________ her. She told me she __________ back till tomorrow!
| A．couldn't be; won't come |
| B．can't be; won't come |
| C．can't be; wouldn't come |
| D．can't have been; wouldn't come |
She was not, as a matter of fact, __________ the situation she was in.
| A．be aware of |
| B．aware of |
| C．be aware that |
| D．aware that |
—Is Jason all right? He looks so tired!
—Not sure. He __________ deep into the night yesterday. He's having an exam soon.
| A．may have studied |
| B．should have studied |
| C．might study |
| D．must have been studying |
He didn't visit his parents living in Toronto regularly, only __________.
| A．again and again |
| B．time and time |
| C．now and then |
| D．since then |