We need to be______ the long-term effect of playing computer games too much on children.
| A．concerned about | B．amazed at |
| C．threatened by | D．tired of |
The street are all wet.It ___ during the night.
| A．must be raining | B．must havge been rain | C．had to rain | D．must have rained |
--Shall we go skating or stay at home?---Which __ do yourself?
| A．do you rather | B．would you rather | C．had you rather | D．should you rather |
The judge asked me many questions and ___.
| A．they had difficulty being answered | B．answering them was with difficulty | C．they were difficult to answer | D．to answer them was to be difficult |
I’m not going to ask the teacher why he gave me that grade; I intend ___.
| A．to let rest the matter | B．the matter to be let resting | C．letting the matter to rest | D．to let the matter rest |
--Now that you like the car so much, why not drive it back?—Well, I can’t afford __car.
| A．that big a | B．a that big | C．that a big | D．a big that |