28.When the telephone rang, I happened________in the kitchen, but when I came over to get it, it
rang off.
| A．to cook | B．to have cooked | C．to be cooking | D．having cooked |
The most important thing about cotton in history is _____ part that it played in
_____ Industrial Revolution.
| A．不填; 不填 | B．the; 不填 | C．the; the | D．a; the |
It’s already 10 o’clock. I wonder how i____________that she was two hours late on such a short trip.
| A．came over | B．came out | C．came about | D．came up |
_______ what would happen, none of them could find a way out.
| A．Left wondering | B．Having left wondering |
| C．Leaving to wonder | D．Having left to wonder |
Students who pass the test will be ______to the next grade, as has been announced.
| A．possessed | B．promoted | C．proposed | D．allowed |
The present financial crisis has put the world economy in a difficult____________
| A．occasion | B．case | C．background | D．situation |