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The baby can't even sit up yet, _____ walk!
A、don't mention
B、let alone
C、other than
D、rather than
【正确答案】：B
【题目解析】：考查词组词义辨析。句意：这个婴儿连坐都不会，更不用说走路了。Don't mention别提了，不客气；let alone更不用说；other than除了，绝不是；rather than与其……倒不如……