It seems oil ______ from this pipe for some time. We’ll have to take the machine

游客2023-11-13 5

问题 It seems oil ______ from this pipe for some time. We’ll have to take the machine apart to put it right.

选项 A、had leaked
B、is leaking
C、leaked
D、has been leaking

答案 D

解析根据句中的时间状语for some time可知，所填空的时态应有两种选择：现在完成时或现在完成进行时，而A 为过去完成时，故D 为答案。

转载请注明原文地址:http://tihaiku.com/zcyy/3183957.html

相关试题推荐

随机试题

最新回复(0)

Heoperatesthenewmachineasifhe______specialtraininginit.A、hasreceive