【題目】When you're learning English, use it, ________ you'll lose it.

A.butB.orC.thenD.and

【答案】B

【解析】

句意:當你學習英語時,用它,否則你會失去它。

A. but但是;B. or否則;C. then然后;D. and并且。祈使句+or +陳述句,表示 “……,否則,……”表示條件和結(jié)果的關(guān)系,and用于祈使句后表示“如果……那么……”,結(jié)合句意,故選B。

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