12. Not until I began to work _______ how much time I had wasted. A. have I realized B. did I realize C. I have realized D. I realized ...

25.It is recommended that the project ____ until all the preparations have been made. A. not be started B. will not be started C. is not started D. is not to be started ...

6.Dorothy worked alongside him,in the beginning,until he proved himself;then gradually she (relinquished) more of the work to him and concentrated on her garden and flowers,and the housework A. gave up B. offered C. took D...

20.You won’t know whether the coat fits you until you ______ it on. A. will try B. have tried C. tried D. are trying ...

1.The train ______ at the present speed until it reaches the foot of the mountain at about nine o’clock tonight. A. went B. is going C. goes D. will be going ...

2.Up until 1970＇s the Irish economy was inward-looking. A. 错误 B. 正确 ...

5.The letter of credit is until December 16th. A. favourable B. invalid C. valid D. unfavourable ...

(判断题)26: It was not until she learned her son had been admitted to the elementary school. A: 对 B: 错 ...

(单选题)17: Not until I went to America ____ what kind of a country she is. A: did I know B: I know C: I didn't know D: I could know ...

(单选题)12: Not until the game had begun ________ at the sports ground. A: had he arrived B: would he have arrived C: did he arrive D: should he have arrived ...