[题目]The river becomes rapid as it passes deep valleys, travelling western Yunnan Province.A. over; through B. through; acrossC. across; through D. through; over 题目和参考答案——青夏教育精英家教网—

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【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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