题目内容
【题目】The river becomes rapid as it passes __________ deep valleys, travelling __________ western Yunnan Province.
A. over; through B. through; across
C. across; through D. through; over
【答案】 B
【解析】句意:当河流穿过深谷,跨过云南省西部时,突然变得湍急。through从中穿过;across. 从平面的一边到另一边。
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