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这个练习题没有答案，适合英语老师用，辛苦各位老师和同学自己做答案吧。部分习题如下：
一、单项选择
1．— Mom, when can I watch TV?
— The moment your homework ________.
A．finishes B．over C．is finished
2．—What languages ________ in that country?
—French and German.
A．is spoken B．are spoken C．are speaking
3．The earth looks blue in space because its surface ________ by ocean.
A．covers B．is covered C．was covered D．have covered
4．Now teenagers ________ to do some voluntary work for homeless children and helpless people.
A．are encouraged B．were encouraged C．have encouraged D．are encouraging
5．The dragon boat race ________ every year on the Dragon Boat Festival in southern China.
A．will be held B．is held C．will hold D．holds
6．This song is very popular recently. It ________ among teenagers.
A．loves B．loved C．will love D．is loved
7．When you _________ something difficult to do, keep on with it and finish it.
A．are given B．gave C．were given D．give
8．— I enjoy walking on the clean streets in the morning.
— You know they ________ by the hard-working cleaners every day.
A．clean B．are cleaned C．will clean
9．—Hi, Jane. Would you like to come to Tim’s birthday party tomorrow?
—I’d love to if I ________.
A．will invite B．am invited C．will be invited
10．—Look at the sign over there.
—Oh, sorry. Parking ________ here. We had better move the car.
A．isn’t allowed B．doesn’t allow C．didn’t allow D．wasn’t allowed
