---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 |
Theytwo free tickets to Australia, otherwise they’d never have been able to afford to go.
| A．had got | B．got | C．have got | D．get |