咀嚼式口器包括（）
A.上唇和下唇
B.上颚和下颚
C.舌
D.喙
参考答案：A, B, C
-Who got the first prize in the English competition yesterday?
-A boy __________ spoken English is very good.[ ]
A. that
B. whose
C. which
D. who
足球场最好的场地是（）
A、沙土
B、草皮
C、煤渣
