路面是用各种不同坚硬材料铺筑在路基上供汽车直接行驶的地带，通常由（）等组成。
A．底层
B．面层
C．基层
D．垫层
参考答案：B, C, D
----Peter is ________ than you, right?
----Yes, but he is ________ runner in our class.
A．heavier; best
B．heavyer; the best
C．heavier; the best
D．heavy; better
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