It is our duty _________our hometown clean and beautiful. We must do something for it.A. to keep B. keeps C. keeping
Why not _______ a taxi to the zoo? It can save us a lot of time.
This blue down coat (羽绒服) looks nice. I want to ________.
—________ will you take? —Small, please.
I want to send Mary a card. She may ________ it in a few days ________ post.
I can’t do the work by myself so I ________ a student to help me.