问题描述：
which is the best way to learn a language?
_______.I'll look after my mum,she is ill
A.I think so B.I'd like to C.I'm afraid not D.I'm afraid so
_______.I'll look after my mum,she is ill
A.I think so B.I'd like to C.I'm afraid not D.I'm afraid so
问题解答：
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