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Tommy, you____ be hooked on the Internet all day. You may fall behind others in study.
A.mustn’tB.shan’tC.can’tD.needn’t
A
考查情态动词。Be hooked on 意为迷上,痴迷 句意为汤米你千万不能整天都痴迷于上网。你可能在学习上落后其他人。
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