The doctors are doing all that they _____, but the old man is still not breathin

题干

The doctors are doing all that they _____, but the old man is still not breathing properly.

A．shall

B．need

C．may

D．can

上一题下一题 0.64难度单项选择更新时间:2013-06-24 08:04:18

小学学科试题库

初中学科试题库

高中学科试题库