题目内容

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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