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It hasn't been proved that sleepwalkers (can't/to wake) safely.

не увидела конкретных условий, поэтому

It hasn't been proved that sleepwalkers can't wake safely.

she and her family live in london.

потому что это множественное число. они живут в лондоне.

1) it was about 3 o’clock yesterday afternoon.

2) we are sitting in the cafe opposite the bank.

3) suddenly a motorcycle stopped outside the bank.

4) there were two men on the bike.

5) one of them got off and ran into the bank.

6) he was carrying a gum.

7) after a short time, he came out of the bank.

8) he carried a large bag.

9) he got back on the bike.

10) a few minutes later the police arrived.