The number of people invited ____ fifty, but a number of them ____ absent for different reasons.
| A．were; was | B．was; was | C．was; were | D．were; were |
—Would you mind giving your advice on how to improve our business management?
—If you make ____ most of the modern equipment, there will be ____ rise in production．
| A．不填; 不填 | B．the; a | C．不填; a | D．the; 不填 |
---Have all the mysteries been cleared up?
--- Almost. But ______ only one question ______.
| A．there remains; answered | B．it remains; to be answered |
| C．there remains; to be answered | D．it remains; answered |
I will never forget my stay there I found my lost wallet.
| A．which | B．that | C．where | D．when |
Please tell me the after service of the computer; I’m worried about a breakdown sometime．
| A．there being | B．it being | C．there is | D．it is |
—Jack can't concentrate on his lessons recently.
—Yes, that might ____ why he did so badly in the last test.
| A．answer for | B．apply for | C．call for | D．account for |