—Tom didn’t come last night,did he?
—No.I _______ have waited for him.A whole night was wasted.
A. would B. should
C. couldn’t D. needn’t
—Tom didn’t come last night,did he?
—No.I _______ have waited for him.A whole night was wasted.
A. would B. should
C. couldn’t D. needn’t
D
needn’t have done表示“本没有必要做但实际上做了”。