Where on vacation last year? a)you went b)did you go c)you did go

did you go

Объяснение:

did используется в времени

1-Has he developed a new design of this machine?
2-Will she have written the report by Monday?
3-Is she conducting the experiment?
4-I don't use computers in my work
5-He was doing the calculations when the professor came.
6-Will you test your construction next week?
7-Had she left the laboratory before the work was finished?
8-Is your theory based on careful observations?
9-Should you start your work at laboratory in the morning?
10-We cant control this research without a computer.
11-Didnt we solve the problem two days ago? Или We didn't solve the problem two days ago. (Смотря если вопрос или отрицательное предложение)
12- She doesn't apply new methods of calculations.

1-Has he developed a new design of this machine?
2-Will she have written the report by Monday?
3-Is she conducting the experiment?
4-I don't use computers in my work
5-He was doing the calculations when the professor came.
6-Will you test your construction next week?
7-Had she left the laboratory before the work was finished?
8-Is your theory based on careful observations?
9-Should you start your work at laboratory in the morning?
10-We cant control this research without a computer.
11-Didnt we solve the problem two days ago? Или We didn't solve the problem two days ago. (Смотря если вопрос или отрицательное предложение)
12- She doesn't apply new methods of calculations.