19．Howmanyhoursofsleepdoteenagersneedeverynight？A．Between9and10．B．Between10and11．C．Between9and11．20．Whenshouldteenagersgotobedatnighttogetenoughsleep？A．Before10：30p．m．B．Ataround10：00p
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问题描述：
19．How many hours of sleep do teenagers need every night？
A．Between 9and 10．
B．Between 10and 11．
C．Between 9and 11．
20．When should teenagers go to bed at night to get enough sleep？
A．Before 10：30p．m．
B．At around 10：00p．m．
C．After 10：30p．m．
21．How do they feel when teenagers don't get enough sleep？
A．Unhappy．
B．Excited．
C．Angry．
22．Where does Tom's mother work？
A．In．school．
B．In a hospital．
C．In a music club．
23．Who wants to learn Chinese？
A．Tom's brother．
B．Tom's father．
C．Tom．
24．How often does Sam go swimming？
A．Every afternoon．
B．Twice a week．
C．Five times．week
25．What lessons does Tom want to take on Fridays
A．Music lessons．
B．Piano lessons．
C．Guitar lessons．
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