Tom`s mother was always telling him what he should do,but( )didn`t help.
人气：479 ℃ 时间：2019-09-29 01:23:38
解答
答案：it
解析：如果从句子的角度看来这个空应该代指前面的句子,可以考虑it和which,但which是从属连词,引导定语从句,前面不能有并列连词but,很明显应该填it
补充：如果有选项的话,用this或that也勉强可以算做正确.
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