25. The doctor recorded the ______ of the old man’s death as heart failure.
| A．effect | B．result | C．reason | D．cause |
“Is there a flight to London this evening？” “There _______ be. I’ll phone the airport and find it out.”
| A．must | B．might | C．would | D．can |
“You ______ your teacher for help. He is kind-hearted.” “Yes. A whole day _______.”
| A．can ask, will waste |
| B．must have asked, had wasted |
| C．could have asked, was wasted |
| D．shouldn’t have asked, would be wasted |
“Why didn’t she come to the meeting yesterday？” “I’m not so sure. She ______ ill.”
| A．should be | B．should have been |
| C．must be | D．might have been |
He ______ the test again, in which case, his mother will be very disappointed.
| A．might fail | B．must have failed |
| C．should fail | D．could have failed |
I didn’t see her in the meeting room this morning. She ______ have spoken at the meeting.
| A．mustn’t | B．shouldn’t | C．needn’t | D．couldn’t |