-You'd better ________ food to the tigers．
-Sorry, I won't do it again．
---Oh, I have a terrible toothache．
---You'd better ________ see a doctor and have your bad teeth ________ out．
--- Shopping with me?
--- Sorry, I have a lot of clothes ________.
-Mike, you ________ ask your teacher for help．He is kind-hearted．
-Yes, mum．I ________．
“Where is Tom?”
“He hasn't come to school today. I think he ______ be ill.”
“You know something about the Chinese food, don't you?”
“Yes, but only _______.”
-I went scuba diving(配带呼吸器的潜泳) last week.
-________. I like it very much.
--Look. What a nice garden!
--Yes. It ________ every day.