Did you leave the doors and windows firmly______?You know there are many burglars there days.
Did you leave the doors and windows firmly______?You know there are many burglars there days.
A to fasten B to be fastened
C fastened D fastening
A to fasten B to be fastened
C fastened D fastening
英语人气：595 ℃时间：2020-05-14 15:25:47
优质解答
C 被动语态而to be不定式表示将来.此为过去式
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