I think ____necessary for us _____the birds.
A. it , protect B. its, to protect
C. it’s , protecting D. it , to protect
There _____lots of fish in this river, and birds catch ______for food.
A. are, them B. are , it C. is, it D. is , them
Do you need more people _____ you _____the birds?
A. help； to count B. to help； counts
C. to help； count D. help； count
Do you know about 70 per cent of our earth _____ water?
A. is covering with B. are covered with
C. are covering with D. is covered with
This kind of watermelons looks______ and sells ______in the market
A. well； good B. good； good C. good； well D. well； well
If you______ your name on the paper, you can get a magazine.
A, cut down B. look down C. turn down D. write down
