Many accidents by careless drivers last year.
A. are caused B. were caused
C. have caused D. will cause
Whenever I see the birds, I’ll flying in the sky.
A. think up B. dream of C. work on D. pick up
It isn’t warm today, the sun is shining.
A. or B. and C. because D. although
—Have you heard of Earth Day?
—Yes. The first Earth Day ____ in 1970 to educate us to protect our planet.
A. celebrates B. celebrated C. is celebrated D. was celebrated
Scientists are trying their best to ways to treat the terrible disease.
A. come up with B. look forward to C. talk about D. give up
—Your city looks beautiful!
—Yes. Lots of trees and grass ______ last year.
A. are planted B. have planted C. were planting D. were planted
