【C19】A．shouldB．couldC．shallD．must

Excuse me, Mr. Li, _______ it be alright if I used your phone？A、willB、wouldC、shallD、sho

【C6】A．shouldB．wouldC．mightD．will

___________ 查看材料A.shouldB.needC.carlD.must

You______have been more careful!A．mustB．couldC．wouldD．need

【C7】A．willB．mayC．shallD．can

【C19】A．could beB．must beC．should beD．would be