问题

I think you should complain —________ of course, youare happy with the way things are.
A:if
B:unless
C:as
D:because
B:unless
C:as
D:because
正确答案是:
同类题型
He got well-prepared for the job interview,for he couldn’t risk________the opportunity
The boss made the workers ________ten hours a day.
Have this seat, granny.—Thank you. __________!
Janny ____ have kept her word. I wonder why she changed her mind. [ ]
Many countries are now setting up national parks ________ animals and plants can be protected.