we go there by train or by ship makes no difference．The time and the fees are the same．
| A．Which | B．How | C．Whether | D．Why |
Perhaps the day will come ____ people will be able to breathe clean air in cities．
| A．when | B．while | C．as | D．since |
Modern forms of transportation and communication have done much to ______ the isolation（隔离）of life in Alaska．
| A．break down | B．break out | C．break into | D．break through |
I can ________ the house being untidy, but I hate it if it’s not clean．
| A．come up with | B．put up with | C．turn to | D．stick to |
_________ Kunming you see today is quite _____ different city from what it used to be．
A．The, 不填 B．不填, a C．The, a D．A．a
Sir, do you have anything _________ this afternoon? If there is nothing to do, I wonder if I can ask for a leave．
| A．typing | B．typed | C．to type | D．to be typed |