Question

I think you should complain —      ,of course, you are happy with the way things are

1. A.
   if
2. B.
   unless
3. C.
   as
4. D.
   because

Answer 1

B
试题分析：考查连词： A. if如果，B. unless除非，C. as正如，因为，随着，D. because因为，句意:我想你应该抱怨——当然除非你对现在的状况满意.unless="if" not,正符合语义，选B。
考点：考查连词