Chia động từ: "While we (do) ... a sight-seeing tour, our friends (he ... on the beach)"

1.While we (do)....a sight-seeing tour , our friends (he....on the beach

2.While Tom (play)....the piano, his mother(do).....the washing up

3.I (go).... after they (finish)....their work

4.The light went out while i (have)....dinner

5.The house(catch).....fire while they were sleeping

6.While Tom was reading , Amely (watch)....a documentary on TV

7.The burglar (open) ....the safe when he (hear)...footsteps.He inmediately (put)......out his torch and (crawl)....under the bed.

8.Last night i (drop)....a plate when I (do)....the washing up .Fortunately it (not/break) ....

9.Mary and I (dance).....the house when the telephone rang.

10.I (open) .... the letter when the wind (blow) ....it out of my hand

11.The boyfell and hurt himself while he (ride).....a bicycle