【正文】
D. happened ( )12. Tom ______ a lot of friends since he came to China last year. A. made B. makes C. is making D. has made ( )13. “The World Without Thieves” is a very moving film. I _____ it twice already. A. will see B. saw C. see D. have seen ( )14. They ___ since the factory opened. A. have worked there B. have worked here C. worked there D. worked here ( )15. — Lucy, __ you ___ your ticket? — Not yet. A. did, find B. have, found C. has, found D. do, find ( )16. — What are you going to do this Saturday? — I ____ yet. A. haven’t decided B. won’t decide C. am not decided D. didn’t decide Remember the use of present perfect tense.