—Don’t look down upon Bob. He has his own advantages.
—Oh, yes. others are weak, he is strong.
| A．If | B．Where |
| C．When | D．Though |
--- Jack fell off the ladder yesterday, but he is all right now?
---What a lucky dog! He _________ himself badly.
| A．should injure | B．might injure | C．should have injured | D．could have injured |
Catherine, ____ the alarm clock for 6 o’clock, or you would oversleep and be late for the train.
| A．setting | B．sets | C．set | D．to set |
The results of the examination ________ that you have all made great progress.
| A．shows | B．show | C．showed | D．has shown |
--- Is your brother going to Jack’s birthday party tonight?
---I am not sure. He __________ go to a concert with his girlfriend instead.
| A．might | B．has to | C．ought to | D．must |
It took a long time for the effective use of natural gas_________．
| A．to be made | B．to make | C．being made | D．making |