The young man we followed stopped and looked as if __________ whether he was going in the right direction.
| A．seeing | B．to have seen |
| C．having seen | D．to see |
Looking back on the three - year life in the mountain village, Thomas it as a milestone in his personal development
| A．values | B．confirms | C．declares | D．assumes |
- - How dangerous it was!
- - Yes, but for the passer - by' s quick action, the girl _____
| A．was drowned | B．could have been drowned |
| C．had drowned | D．should be drowned |
－When will the expert come and give the lecture on economic development
－Not until our program ____by the government
| A．approves | B．is to approve |
| C．will be approved | D．has been approved |
The question that puzzled them is ____ they can get rid of the air pollution in the area.
| A．how is it that | B．that is how | C．what is that | D．how it is that |
Rock-climbing is a breathtaking activity, very popular nationwide among young people, ______ cooperation as well as courage plays an important role.
| A．who | B．which | C．where | D．of which |