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I can't dance, ________ I can sing.

[　　]

I can't dance, ________ I can sing.

[　　]

I don’t like physics ______ it’s too difficult for me.

A．and              B．so               C．because          D．but

I don’t like physics ______ it’s too difficult for me.

I don’t like physics ______ it’s too difficult for me.