Shall I tell Tom about it?No,you__.I've told him already.A,shouldn't B,needn't为什么?

问题描述:

Shall I tell Tom about it?No,you__.I've told him already.A,shouldn't B,needn't
为什么?

B
I've told him already.我已经告诉Tom了.说明你没有必要再告诉Tom.
所以用
needn't没有必要
shouldn't不应该(不和题意)