---Someone’s been here. Who ___ it be? It looks like Helen.---It ___ be Helen.She is ill in hospital.
#88920
A
must; must
B
might; could
C
can; mustn’t
D
can; can’t
推荐题目
He said that he would write to us but so far we ___________ from him.
#87738
A
didn’t hear
B
haven’t heard
C
shouldn’t have heard
D
hadn’t heard
 The project was carefully planned, or a great deal of money ________.
#86486
A
will lose
B
will be lost
C
would have lost
D
would have been lost