单项选择题

Neither the unpleasant experiences nor the bad luck （）him discouraged.

A.have caused
B.has caused
C.has made
D.have made

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单项选择题
She is （），from her recording，the diaries of Simon Forman.

A.transcribing
B.keeping
C.paraphrasing
D.recollecting
单项选择题
The main difference between m ， n ，and η lies in（）.

A.manner of articulation
B.sound duration
C.place of articulation
D.voicing
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