. The millions of calculations involved, had they been done by hand, _____ all practical value by the time they were finished.
| A．could lose | B．would have lost | C．might lose | D．ought to have lost |
—I didn’t take notes at yesterday’s meeting because I had left my pen at home.
—You ________ mine. I ______ it.
| A．must have borrowed; wasn’t using | B．may have borrowed; wasn’t using |
| C．should have borrowed; hadn’t used | D．could have borrowed; wasn’t using |
We’ve been told the good news, but when and where to go for the exciting paid vacation _______ yet.
| A．are not discussed | B．have not been discussed |
| C．is not being discussed | D．has not been discussed |
The police at Denver International Airport examined a bomb threat against a United Airlines flight to San Francisco,____________ the flight for hours.
| A．delayed | B．to delay | C．delaying | D．had delayed |
—Stay a bit longer, please. It’s been such _______ fun having you here.
—Thank you, but I’ve got _______ early start tomorrow morning.
| A．/ ; the | B．a; an | C．/; an | D．the; an |
All of us want very much to see these amusing movies, especially _______ you referred to just now.
| A．any | B．it | C． the one | D．one |