He was doing his homework when I called him.

• a) Correct

• a) Wrong

George .................... (paint) the ceiling when he .................. (fall) off the ladder.

• fell - painted

• was painting - fell

• was painting - was falling

• was falling - painted

Mary ................... (preparing) lunch when they ..................... (come) to my house.

• was preparing/came

• prepared/came

• prepared/was coming

• was preparing/was coming

When I .................. the cafeteria, Mary ............................ lunch with Peter.

• entered/had

• entered/was having

• was entering/had

• was entering/was having

Miranda .............. to work when she ................. seeing the accident.

• drove/saw

• drove/was seeing

• was driving/saw

• was driving.was seeing

I .............................home when I met my old friend from primary school. 

• walked
• was walking 
• was coming

I __ when I __ burnt

• was cooking, got

• cooked, was getting

• was cooking, was getting

• cooked, got

When her father..................., Sally ......................

• was arriving, was cooking

• was arriving, cooked

• arrived, cooked

• arrived, was cooking

What (you/do) when I (call) you last night?

• did you do / was calling
• were you doing / called

I ......................... my car when it ......................... to rain.

• was driving / started
• drove / was starting
• drove / started
• was driving / was starting