多数学者认为，我国第一个奴隶制国家是（）
A.夏朝
B.商朝
C.西周
D.尧舜时期
参考答案：A
选择填空。
You ______ your clothes now. [ ]
A. had better to wash
B. had better wash
C. had better washing
D. would better wash
五香粉是以八角、（）、山奈、花椒、草果等原料制作而成。
A、陈皮
B、桂皮
C、柠檬皮
D、果皮
