Question

ПОМОГИТЕ ПОЖАЛУЙСТА!! II. Раскройте скобки, употребляя глагол в Past Continuous. A. What was happening (happen) at the time of the robbery? B. Well, I ____ (sit) in my office. I __________________ (talk) to an employee. Mary ______ (put) food onto the shelves. Several customers ______ (do) the shopping and a cashier ______ (stand) behind the till. A. Can you tell me anything about the robbers?B. Yes. They _____ (wear) black masks and they  (hold)  guns. They ______ (shout). A. How did they get away?B. They drove off  in a car which  ______________________ (wait) outside.

Answer 1

Здесь же не трудно. 
В Past Continuous просто надо каждый глагол писать в форме was + окончание ing (если имя существительное в единственном числе)  или  were + ing (если в множественном). 
В документе всё написано.

Answer 2

Конечно, я помогу вам преобразовать предложения, используя глаголы в Past Continuous:

A. What was happening (happen) at the time of the robbery?

• What was happening at the time of the robbery?

B. Well, I was sitting (sit) in my office. I was talking (talk) to an employee. Mary was putting (put) food onto the shelves. Several customers were doing (do) the shopping, and a cashier was standing (stand) behind the till.

A. Can you tell me anything about the robbers?

• Can you tell me anything about the robbers?

B. Yes. They were wearing (wear) black masks, and they were holding (hold) guns. They were shouting (shout).

A. How did they get away?

• How did they get away?

B. They drove off in a car which was waiting (wait) outside.

• Они уехали на машине, которая ждала снаружи.