Don't wait for me,if I am late.Before I come to the meeting of the group I will come to the dean's office and take the necessary papers.
14 John won't begin writing the new article until he finishes the first one and shows it to his boss.
15 We won't discuss this film at the English lessons until(before) all students see it.
16 Turn off the radio and electricity before you leave the house.
17 The secretary will type these letters after the director approves them.
18 We will study in the reading-room until it closes.
19 That's no way he will make the report if he doesn't get all data(information)at least for a week.
20 If you would like to have a good laugh
go to watch this film.
1 - d
2 - c
3 - d
4 - d
5 - a
6 - d
7 - c
8 - c
9 - a
10 - b
В выделенных не уверен на 100%. Какая-то специфическая область экономики.