Many trees and flowers ________ in our school last year，and they made our school a beautiful garden．
A．plant B．planted
C．have planted D．were planted
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
