问题
选择题
How can you ___ if you are not ___?
A．listen, hearing
B．hear, listening
C．be listening, heard
D．be hearing, listened to
答案
答案：B
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How can you ___ if you are not ___?
A．listen, hearing
B．hear, listening
C．be listening, heard
D．be hearing, listened to
答案：B