I’m moving to the countryside because the air there is much fresher than ____ in the city.
| A．ones | B．one | C．that | D．those |
Do you know the great difficulty he had the work in time?
| A．finished |
| B．finishing |
| C．to finish |
| D．finish |
The place the bridge is supposed to be built should be the cross-river traffic is the heaviest.
| A．which; where |
| B．at which; which |
| C．at which; where |
| D．which; in which |
Mary wrote an article on the team had failed to win the game.
| A．why |
| B．what |
| C．who |
| D．that |
After Yang Liwei succeeded in circling the earth,our astronauts desired to do was walking in space.
A. where
B. what
C．that
D，how
We can not figure out quite a number of insects, birds, and animals are dying out.
| A．that |
| B．as |
| C．why |
| D．when |