If there is any change about the time of the meeting, please inform us ____．
| A．at present | B．in the meanwhile | C．at times | D．in advance |
_________ is known to us all is that the 2012 Olympic Games will take place in London.
| A．As | B．What | C．That | D．It |
Mr. Stevenson is great to work for—I really couldn’ t ask for a _______ boss.
| A．better | B．good | C．best | D．still better |
He made another wonderful discovery, ______ of great importance to science.
| A．which I think is | B．which I think it is |
| C．which I think | D．I think which is |
Was it because of the heavy snowstorm in Europe _______ the flight had to be put off ?
| A．which | B．so | C．why | D．that |
Not until the taxi disappeared in the distanceher handbag was gone.
| A．Tina had found | B．had Tina found | C．did Tina find | D．Tina found |