It seems oil______from this pipe for some time. We’ 11 have to take the machine

游客2023-10-18 65

问题 It seems oil______from this pipe for some time. We’ 11 have to take the machine apart to put it right.

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

答案 D

解析

转载请注明原文地址:http://tihaiku.com/zcyy/3110089.html

相关试题推荐

随机试题

最新回复(0)

Inthisfactory,themachinesarenotregulated________butarejointlycontrolled