The Great Wall is __________ tourist attraction that millions of people pour in every year.
| A．so well-known a | B．a so well-known |
| C．such well-known a | D．a such well-known |
—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 |
To stay safe in the forest at night, we should try hard to keep the fire __________.
| A．burning |
| B．burnt |
| C．to be burning |
| D．being burnt |