he joined the army last year.变为含现在完成时的句子→→It __
hejoinedthearmylastyear.变为含现在完成时的句子→→It____ayear__hejoinedthearmy.空里填什么...
he joined the army last year.变为含现在完成时的句子→→It __ __ a year __ he joined the army.空里填什么
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