It is by no means clear the president can do to end the strike.
| A．how | B．which |
| C．that | D．what |
The nurse doesn't feel well today, _________ she still works very hard.
| A．but | B．and | C．or | D．when |
Tom has been in the factory _________he left school.
| A．when | B．since | C．as soon as | D．whether |
He had _________ much work to do that he couldn't go out.
| A．so | B．such | C．as | D．or |
________the new computer, travellers at the offices of CAAC can now buy their air tickets much faster.
| A．Because | B．Thanks for | C．Thanks to | D．Since |
Before 1992, there was no airline _________ the two cities.
| A．along | B．in | C．between | D．among |