17: My sister__________ to play the piano for five years. She can play it very well. A. learned B. has learned C. is learning D. 18: They gave up__________ for the missing plane 2 years ago. A. searching B. to searching C. to search D. 19: Martha is talking to John, her brother, in the dining room. Martha: “Would you like some more chicken?” John: “__________. I'm full.” A. No, thanks B. Sure C. Yes, please D. No problem 20: If it__________ tomorrow, we will stay home and watch TV A. will rain B. rained C. would rain D. rains 21: After two weeks off because of Covid 19 pandemic, we went back to school__________ May 17th to continue our study. A. to B. at C. in D. on 22: I am wearing a T-shirt today because it is__________ an it was yesterday A. hot B. hotter C. the hottest D. more hotter 23: Mr. Kent is a doctor, __________? A. doesn't he B. is he C. does he D. isn't he 24: My family went to Africa__________ we wanted to know more about wild animals. A. so B. although C. therefore D. because 25: Tom: __________ do you play badminton? Peter: Three times a week. A. How long B. What time C. How often D. How far 26: When he was young__________ soccer in this stadium. A. playing B. plays C. played D. play 27: The advantage living in the countryside is that the air is not__________. A. pollution B. polluting C. pollute D. polluted 28: He is not very good__________ mathematics and neither is his brother. A. on B. in C. for D. at 29: They run a lot every day__________ keep fit. A. so as not to B. in order that C. so that D. in order to 30: I want__________ a big cake for my little daughter this weekend. A. make B. to make C. making D. to making