We should do everything we can the environment .A. to protect B. protect C. protecting
--- Is this ______ apple? ---- No, it’s ______ orange.
---Could you please help me to take these books there? ---_____.
_____ he is busy, ______ he helps his parents with the housework on weekends.
I exercise every day, so I am _____ healthy.
Students should study hard to make their dreams_______.