单选题：The river widens considerably as it begins to turn west．

题目内容：

The river widens considerably as it begins to turn west． A．twists
B．stretches
C．broadens
D．bends

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答案解析：

靖在第_____处填上正确答案。

靖在第_____处填上正确答案。A．within B．above C．to D．on

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