what...when the accident happened?1. you do 2.were you doing 3. have

What...when the accident happened?
1. you do 2.were you doing 3. have you done 4.are you doing
My boss was angry because I ... the work on time
1. hadn't to 2.haven't don 3. hadn't done 4. didn't do
My grandfather enjoyed ... in an international company
1.working 2. worked 3. to work 4. works
I used to .... that game when we were younger
1 played 2 playing 3 to play 4 play
Could you tell me when....?
1 does the train arrive 2 the train arrives 3 will the train arrive 4 is the train arrive
Everyone was .... by the sudden noise
1 surprise 2 surprises 3 surprising 4surprised
The Italian city of Florence is famouse ... its art ....
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