英语四级
单选题
A．stable
B．splendid
C．smooth
D．complicated
参考答案：C进入在线模考
【解析】选[C]。语义衔接题。本题承接上题，在描述美国高速路的优势，由此可推知这些高速路一般都是很平坦的，放答案为[C]smooth。[B]splendid意为“极好的”，但不能与空后的well maintained构成语义场共现；[A]stable“稳定的”和[D]complicated“复杂的”均与此处语义不符。
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