When I reached front door, I suddenly saw strange sight last night.
| A．the; 不填 | B．a; the |
| C．不填; a | D．the; a |
The scientists are now trying to discover what use could be ____ such material.
| A．made out | B．made up | C．made of | D．made from |
This tree looks high and strong but ____ its trunk is hollow.
| A．really | B．truly | C．actually | D．surely |
—Smoking is bad for your health.
— Yes, I know. But I simply can’t ____.
| A．give it up | B．give it in | C．give it out | D．give it away |
– Do you know the West Lake in Hangzhou?
– Yes, this is the third time that I ____ this beautiful city.
| A．visit | B．visited | C．have visited | D．had visited |
We’ll have to finish the work, ____.
| A．no matter how long does it take | B．it takes however long |
| C．however long it takes | D．however it takes long |