下列句子中哪些你已经学过？你不想全部了解一下吗？请在B栏中找出A栏问句的答语。每小题1分，共12 分。
There ________ four people in my family. A. isB. amC. are
I want to ________ a doctor. A. beB. isC. are
Where ________ she come from? A. doB. doesC. did
My dad ________ my pet dog. A. take care ofB. take careC. takes care of
She likes ________. A. play the piano B. playing the piano C. playing piano
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