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1:Excuse me,wouls you please let me push ahead in the queue

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1:Excuse me,wouls you please let me push ahead in the queue to buy my ticket because my train ()off?
Of course
A.leaves B.is leaving C.has left D left
2:Li Ming( )a book on the history of the Party last year but l don´t know if he has finished.
A.has written B.wrote C.had written D,was writing
3:()ýou( ) your homework?
Yes.l ( ) it a moment ago.
A.Have done finished B.Did do finished C.Have done have finished D.Will do finish
B(请问能不能让我先买票,我的火车要开了.这里是用进行时表示一种夸张的说法.)
D(去年他一直在写一本关于党史的书,但我不知道他现在结束了没有.过去一直做某事用过去进行时态)
A(问句中是问:你完成作业了没?用现在完成时态,答句中ago是一般过去时态的标志,所以用动词过去式)