单项选择题
A.hold；responsibility B.ask；responsibility C.hold；responsible D.require；responsible
It has something （） with poor workmanship and assembly,...
单项选择题It has something （） with poor workmanship and assembly, doesn’t it?
A.do B.to do C.done D.doing
The certificate for the refrigerating plant will（）soonI...
单项选择题The certificate for the refrigerating plant will（）soonI’d like to extend its validation now.
A.update B.finish C.outdated D.expire
（）, remedies must be taken to stop it as early as possi...
单项选择题（）, remedies must be taken to stop it as early as possible.
A.Any surge occurs B.Any surge occurred C.Should any surge occur D.Should any surge occurring
