Now Jerry ______ the exchange programme with his classmates in the meeting room.
| A．discussed | B．is discussing |
| C．was discussing | D．has discussed |
When I traveled in Thailand , I bought a ring . It __________ silver .
| A．was made in | B．was made by |
| C．was made of | D．was made from |
Judy used to be ____． Now she’s very shy．
| A．quiet | B．outgoing | C．smart | D．on |
Every year, we plant many trees on _______ side of the road to make our city more beautiful.
| A．both | B．all | C．each | D．neither |
If there are ______ trees, the air in our city will be _______ cleaner.
| A．less, more | B．more, more |
| C．more, much | D．much, more |
You shouldn't ____ the boy's mistakes．
| A．laugh at | B．smile | C．laugh | D．laugh down |