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Как известно, Лондон...

While Tom was reading, Amely watched a documentary on TV.

Marvin came home, switched on the computer and checked his emails.

The thief sneaked into the house, stealed the jewels and left without a trace.

Nobody was listening while the teacher was explaining the tenses. 

While we were doing a sight-seeing tour our friends lied on the beach.

He woke up and looked at his watch. 

1) a 
2) some
3) any
4) on
5) at

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