Question

—Look，I’ve bought some bread，including your favorite flavor.
—You ________ any because we still have plenty at home.

A．should have bought

B．could have bought

C．needn’t have bought

D．mustn’t have bought

Answer 1

C
解析　答语句意为：你没有必要买，因为家里还有很多。故应用needn’t have done表示本不必做而实际上做了。could have done 表示过去本可以做某事却没做；should have done表示本应该做而实际上未做；mustn’t表示禁止。