12. since..., I have heard nothing from him A.he had left B.he left C.he has left D.he was left 13. after I...lunch, I looked for my bag A.had B.had had C.have has D.have had 14. by the end of next year, George...English for 2 years A.will have learned B.will learn C.has learned D.would learn 15. Henry...into the restaurant when the writer was having dinner A.was going B. went C.has gone D.did go 16. he will take the dog out for a walk as soon as he...dinner A.finish B.finishes C. will finish D. finishing