Question

You ________ in person; a telephone would have been enough.

A．couldn't have come	B．needn't have come
C．shouldn't have come	D．mustn't have come

Answer 1

B

B考察情态动词加完成式的用法。couldn't have come不可能已经做了某事；         needn't have come 本不必做某事； shouldn't have come本不应该做某事；        mustn't禁止，千万不要。句义：你本不必亲自过来，打个电话就可以了。故B正确。