– I have difficulty in learning English. I don’t know _______.
– Why not join an English club?
A. why to do                    B. what to do                   C. when to do
B

試題分析：have difficulty in doing sth.做某事有困難，why not do sth.為什么不……？why為什么，what什么，when什么時候，根據(jù)答語：你為什么不去參加英語俱樂部？可知上句意為：我學習英語有困難，我不知道該做什么？故選B。
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