1.Theyshouldnotallow(take)thebooksoutoftheroom.2.Thetrainhalfanhourago.火车本应在半小时之前到达.（每空次数不限）3.Hurryup,orwefinishthetaskontime.否则我们不能按时完成

Question

1.They should not allow ____ (take) the books out of the room.
2.The train _________ half an hour ago.
火车本应在半小时之前到达.（每空次数不限）
3.Hurry up,or we ____ ____ ____ finish the task on time.
否则我们不能按时完成任务.
谢谢、请问第一题是否要用被动语态呢

Answer 1

1.to take
2.should arrive
3.will fail to
1.allow to do sth.允许做某事
2.should have arrived should have done 本应做而没有做
3.fail to do 做某事没有完成