. Jack almost fell off the cliff, but managed to _____ until help came.
| A．keep on | B．catch on | C．count on | D．hang on |
（2014届福建省龙岩市高三毕业班教学质量检查 ）
Tony is a lawyer now, but he in a delivery company for six years.
| A．has served | B．had served | C．was serving | D．served |
（届江西省九所重点中学高三下学期3月联合考试 ）
— Why do you do volunteer work in the North-West?
— I___ to improve the lives of the children there through my efforts．
| A．was trying | B．have tried |
| C．am trying | D．tried |
（届江苏省南京市高三第二次英语模拟试卷
At sixty, Maugham decided to withdraw from the theater and wrote The Summer Up, in which he tried to review what he _______ from his life and literature.
| A．had learned | B．has learned | C．was learning | D．would learn |
（届安徽省合肥市高三第二次模拟考试 ）
— We thought he would have got the job.
— What a pity! He ______too nervous when interviewed.
| A．was | B．had been | C．has been | D．would have been |
（届安徽省合肥市高三第二次模拟考试 ）
After Tom had finished some paper work, he ______ interviewing the applicants.
| A．starts | B．had started | C．started | D．has started |