【題目】According to the rule,used batteries be dropped in the red bin for harmful wastes.

A. mustB. needC. canD. may

【答案】A

【解析】

句意:根據(jù)規(guī)定,廢舊電池必須投到紅色垃圾箱中,以防產(chǎn)生有害廢物。

A. must必須;B. need需要;C. can能,會;D. may可以。根據(jù)下文in the red bin for harmful wastes.可知這里是說必須被丟到紅色垃圾箱。根據(jù)題意,故選A。

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