题目内容
I think you should complain — ,of course, you are happy with the way things are.
| A．if | B．unless | C．as | D．because |
B
解析试题分析：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
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