They seemed ______ each other for a long time.
| A．knowing | B．to know | C．having known | D．to have known |
Viewers will have ____ second chance to see Saturday’s concert on ____ Channel 4 tonight.
| A．a; the | B．the; the | C．the; 不填 | D．a; 不填 |
I really don’t know _______ I put my wallet.
| A．where was it | B．it was where that |
| C．where it was that | D．where was it that |
There is no _______ to think more about the matter. Take it easy.
| A．point | B．doubt | C．worry | D．need |
The young man，who by then _______ admission to university，decided to do some part-time jobs to gain more practical experience．
| A．gained | B．was gaining | C．has gained | D．had gained |
—Jack took the 8:30 bus to Guangzhou this morning.
—Really? He ______ 8:20 Express. It is much more comfortable and faster to travel by train.
| A．could have taken | B．would have taken | C．need have taken | D．must have taken |