Question

(2011·江西高考)It ________be the postman at the door.It's only six o'clock.

A．mustn't	B．can't
C．won't	D．needn't

Answer 1

B

選B　考查情態(tài)動(dòng)詞。句意：門口不可能是郵遞員，(現(xiàn)在)才六點(diǎn)鐘。 對(duì)現(xiàn)在的否定推測，由It's only six o'clock.分析可知應(yīng)用can't(不可能)。mustn't“禁止”， won't“不會(huì)”，needn't“不必”，均不合句意。