Experts warn that global warming will cause extreme climate changes including more______ floods, heat waves and droughts.
| A．usual | B．ordinary | C．frequent | D．common |
Some very common things such asto the sun for a long time will do harm to people's skin and even cause skin cancer
| A．exposing | B．being exposed | C．having exposed | D．exposed |
you may have , you should gather your courage to face the challenge .
| A．However serious a problem | B．Whatever serious a problem |
| C．However a serious problem | D．No matter how a serious problem |
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 |