You should have ____ good knowledge of English if you want to find a job here. Because English is the working language in_______ most international trade centers.
| A．不填；the | B．不填；不填 | C．a; 不填 | D．a; the |
As is natural, a man as old as he ____ be very forgetful.
| A．can | B．should | C．would | D．must |
Can’t we just live in today, _______ the worries of tomorrow or the regrets of the past?
| A．free from | B．aware of | C．sure of | D．tired from |
I had been puzzled over the problem for over an hour without any result, ____ all at once the solution flashed across my mind.
| A．while | B．when | C．then | D．as |
On the third floor there are two rooms, ____ is used as a meeting-room.
| A．one of them | B．the larger of which |
| C．and a larger of them | D．the largest one of which |
---Does ____ of the two foreigners work in Chengdu?
---Yes.____ of them have been working here as English teachers for three years now.
| A．any; Both | B．either; All | C．either; Both | D．both, Both |