There are ____ people in the park.A.lots of B.lot of C.a lot
There are books in our library.A. many and many B. more and more C. some and some
We should not cut trees.A. off B. up C. down
The weather is getting in August.A. more hot B. hoter C. hotter
Trees can keep cool.A. us B. we C. our
We need more trees.A. plant B. to plant C. planting