We can’t go to the mountain ________ the bad weather.
A. because B. because of C. although
It’s every policeman’s dream to keep people and the traffic in good order.
| A．safe | B．healthy | C．busy | D．famous |
We have done much to protect the environment. So the river is getting than before.
| A．dirtier | B．dirty | C．cleaner | D．clean |
Many city people their bikes to work every day.
| A．ride | B．will ride | C．rode | D．have ridden |
Before you go to Canada, you need to learn more it.
| A．form | B．in | C．by | D．about |
Everyone likes my father because is friendly.
| A．his | B．him | C．he | D．himself |