选择正确的答案，并将其编号填在括号里。
（_______） 1. You ____ good at music.
A.is B. are C. be
（_______） 2. _____ often work on holidays.
A. Singers B. Doctors C. Teachers
（_______） 3. _____ wants to be a doctor.
A. YangMing B.Julia C. Sally
（_______） 4.____ can make people happy.
A.Singers B. Doctors C Teachers
（_______） 5 ______ is good at music,
A. YangMing B.Julia C. Sally
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