问题

I can’t get through to the generalmanager’s office anyhow.—— The line is busy. Someone _____ thetelephone.
A:well off
B:uses
C:must have been using
D:must be using
B:uses
C:must have been using
D:must be using
正确答案是:
同类题型
Her parents’ quarrelling with each other _________ is the main cause of her family’s breaking up.
Exercise One should be done in class as an example, while the rest ________ as homework. [ ]
Hardly ________________ she heard the strange scream coming from behind a tree
m so tired. I can’t walk any further. —_____ , my dear. You can make it.
___________ there a map and two posters on the wall— Sorry, I don’t know.