I study math by ____ lots of exercises. A. did B. doing C. do
---Hi, Jack. Is this your new bike? ---No, _________is over there. It’s a present from my uncle.
My PE teacher often teaches us how to play ________football.
Your home town is really nice!The air quality is as good as______of Sanya.
---I'm going to give a talk on the Dragon Boat Festival to the exchange students. ---Great! But don't forget to tell them______.
---Jack, I'd like to have your opinions about my report. ---________.But I have one suggestion.