We offered these students a summer course, aimed __________ improving their spoken English.
| A．to | B．in |
| C．at | D．for |
--May I speak to your manager at four o’clock this afternoon?
--I’m sorry. He ________ to a conference long before then.
| A．will have gone | B．had gone | C．would go | D．has gone |
--Is that Wenfeng Road over there?
--It ________ be, I’m not sure.
| A．can | B．could | C．must | D．should |
If you like art and enjoy looking at the pictures, ________ is an interest.
| A．which | B．that | C．as | D．what |
___many times, the determined man didn’t give up and was finally offered a position in the firm.
| A．Being refused | B．Refusing | C．Having been refused | D．To be refused |
In case of fire, stay low to the ground in a smoky room, ________ smoke always rises towards the ceiling.
| A．as | B．when | C．while | D．once |