问题标题:
1.Theplanelanded_______(safe)2.Thestudentsmust________(finish)homeworkontime
问题描述:

1.Theplanelanded_______(safe)2.Thestudentsmust________(finish)homeworkontime

吕文先回答:
  1.Theplanelandedsafely.   2.Thestudentsmustfinishhomeworkontime.
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