问题
They are said to have been familiar with each other.— But they_________. They were introduced only hours ago.
A:may not have been
B:couldn’t have been
C:mustn’t have been
D:needn’t have been;
B:couldn’t have been
C:mustn’t have been
D:needn’t have been;
正确答案是：
同类题型
He will have learned English for eight years by the time he _____ from the university next year
Miss Li, could you give me on English learning—Certainly. First you should speak English every day.
Not only she but also Dick and I _______ interested in maths.
Is John coming by train? —-He should, but he __________not. He likes driving his car. [ ]
Dad ought to stop working—Yes, he has a bad headache because he _______ too long.