How many tons ______ the elephant ______ ?

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问题 How many tons ______ the elephant ______ ?

选项 A、is...weigh
B、does...weigh
C、are...weigh

答案B

解析 谓语是实义动词,其疑问句应由助动词构成。weigh是不及物动词,意为“重量达,重若干”。
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