選A
意思是“不必要”!
It is not ＿＿for the students to finish their homework within three hours.
It is not ＿＿for the students to finish their homework within three hours.
a.required
b.able
c.necessary
d.certain
a.required
b.able
c.necessary
d.certain
英語人氣：647 ℃時間：2020-04-03 14:15:41
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