单项选择题

A．They eat protein.
B．They never move from one location.
C．They cause erosion of rocks.
D．They will never be useful to people.
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单项选择题
A．He got out of the shower to answer the phone.B．He didn’t hear the phone ringing.C．There’s something wrong with the shower.D．He took a shower earlier than usual.
A．He got out of the shower to answer the phone.
B．He didn’t hear the phone ringing.
C．There’s something wrong with the shower.
D．He took a shower earlier than usual.
单项选择题
A．Holiday celebrations in the United States often ignore the importance of family.B．Holiday celebrations in the United States often are centered around the family.C．Holiday celebrations in the United States often are centered around work.D．Holiday celebrations in the United States often are centered around animals.
A．Holiday celebrations in the United States often ignore the importance of family.
B．Holiday celebrations in the United States often are centered around the family.
C．Holiday celebrations in the United States often are centered around work.
D．Holiday celebrations in the United States often are centered around animals.
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