---Must I see a doctor right now?
----No, you______see a doctor for the time being.
| A．can’t | B．shouldn’t | C．needn’t | D．mustn’t |
Some people fear that ________ air pollution may bring about changes in ________ weather around the world.
| A．/；the | B．the；/ | C．an；the | D．the；a |
Only when I left my parents for Italy________ how much I loved them.
| A．I realized | B．I had realized |
| C．had I realized | D．did I realize |
Though the girl hasn’t lost________ heart to him，he hasn’t lost________ heart.
| A．her；/ | B．the；his | C．/；his | D．her；the |
The two drivers could do nothing but________ the truck.
| A．to take turns to drive | B．take turns to drive |
| C．to drive by turns | D．drive by turns |
With two more professional hands________ you with the work later on，scarcely will you have trouble________ your task ahead of time.
| A．helping；completing | B．help；to complete |
| C．will help；completed | D．to help；completing |