．_______ we couldn’t understand was _______ more and more students went abroad after graduation.
| A．What; because | B．That; because | C．Why; that | D．What; why |
There has been ____ accidents on this part of road.
| A．a number of | B．a great deal of |
| C．a series of | D．plenty of |
– Are you getting a new apartment this year?
– ____ I can’t afford to pay my bills, let alone buy a new apartment.
| A．Not at all. | B．You must be joking. |
| C．Are you sure? | D．Good idea! |
He’s ____ working in Germany as a representative of a Chinese company.
| A．at once | B．at a time | C．at present | D．on time |
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 |