1.-What is she? -She is______.
A.a singer and a dancer .
B.a singer and dancer.
C.the singer and dancer.
D.singer and dancer
2.-How did you pay the workers?
-As a rule,they were paid ______.
A.by a hour . B.by hours
C.by an hour D.by the hour
3.-Where is your brother?
-At ________.
A.Mr. Green's B.Mr. Green
C.the Mr. Green D.the Green's
1、B（既是歌手又是舞者） 2、D（按什么来计算、如果是抽象名词即大单位的话就用by +weight /volume ……如果是小单位就用by +the +meter /hour ……）3、D(the green' s 表示格林家的诊所或店铺 )
1B a singer and dancer是单数，表示既是歌手又是舞蹈家，其余的是复数，不能用在is后
2B by hours按照小时付费，很显然没有人之工作一小时用复数
3Dthe+姓氏的所有格表示姓氏的家庭
1.-What is she? -She is______.
B.a singer and dancer.
2.-How did you pay the workers?
-As a rule,they were paid ______.
C.by an hour
3.-Where is your brother?
-At ________.
A.Mr. Green's
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