题目内容
The teachers and parents all agree that teenagers should by all means _______ their studies though there are a lot of attractions around them.
A．devote to B． fix on C．concentrate on D．keep on
C
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题目内容
The teachers and parents all agree that teenagers should by all means _______ their studies though there are a lot of attractions around them.
A．devote to B． fix on C．concentrate on D．keep on
C