I think much emphasis _ our pronunciation.
A.must be placed
B.ought to be placed on
C.must place on
D.should be placed to
I think much emphasis ought to be placed on our pronunciation.
参考译文:我认为应该把重点放在我们的发音上面。
A.must be placed(错误:缺少介词on)
B.ought to be placed on(正确)
C.must place on(错误:主动语态使用错误,应该使用被动语态)
D.should be placed to(错误:后面介词错误使用,应该用介词on)
(1)主动结构“A place emphasis on B”意思为“A把重点放在B的上面”
(2)被动结构“emphasis be placed on B by A”意思为“重点被放在B上面”
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