找朋友（根据所给情景选择正确语句）。
Are you at home? A.help B.helps C.helpful
What can you ? A.does B.do C.for
----Can they do the dishes? ----No,they . A.can B.can't C.do
----Can you set the table? ----Yes,I . A.do B.can C.can't
I have math Thursdays. A. in.B.onC.at
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