(giúp em chi tiết với ạ) 14.Do you know the mechanic _______________ fixed your car? A. which B. who C. what D. where 15. She turned to another _________ to watch the football match. A. television B. cable C. program D. channel 16.A new hospital for children __________________in our city. A . has built B . is building C . has been built D . builds 17.Tim ________ go fishing with his father when he was young. A. used to B. is used to C. has used to D. was used to 18.I haven’t been to a party ___________ ages. A. in B. as C. for D. since 19.The villagers’ lives were simple and they were _________ need of many things. A. with B. about C. on D. in