If you get on well your classmates, you’ll enjoy your school life more.
| A．to | B．at | C．with | D．in |
you smile at others,they will smile back.
| A．Before | B．When | C．Until | D．Though |
--- Look! What’s on the ground?
--- Oh, it’s my sweater. Please .
| A．pick it up | B．put it on |
| C．give it out | D．take it off |
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 |