Question

10.- I
(study) grammar when I
(fall) asleep.

11.- The scientists
(work) in their laboratory
when they
(discover) the new drug.

12.- We
(climb) the wall when the gardener
(see) us.

13.-Vicky
(have) a beautiful dream when the alarm clock
(ring)

14.- As he
(run) for the bus he
(collide) with
a street lamp.

15.- When he
(carry) a suitcase, he
(drop) it on
his foot.

16..-
(you / do) your homework on the bus
while you
(come) to school?

17. The students
(read) the article when
the last class
(finish).

18.- When I
(arrive) at the cinema, my
friends
(wait) for me.

19.-
(you listen to the teacher when she
(explain this exercise?

20.- Susan
(play) the piano while Mary
(sing).​

Answer 1

What's.........????......?