用护肤品皮肤会变好吗:3.Jack __ have arrived yet,otherwise he would have telephoned me.

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(mustn't/can't/shouldn't/need not)
应该选什么,怎么分析的??

shouldn't, 首先,need not 由于意思不符可先排除,其次,mustn't/can't/shouldn't只是语气程度上的区别,mustn't/can't肯定语气比较强烈,should/would语气较弱,由于上句中otherwise后用了would have telephoned,所以可以推测出说话人也并不是十分的肯定,故选shouldn't