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Can you do ______ in math than before?

A．well　　B．good　　C．better D．best

Who sings ________ in your class.

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Tom sings ________ .He sings ________ in his class .

[　　]

Who sings ________ in your class.

[　　]

Tom sings ________ .He sings ________ in his class .

[　　]