Verified answer

Ответ:

1 в твоём задании нет грамматической структуры для данного предложения, здесь должен быть Present Perfect Continuous

She has been working at school for a year.

если использовать Present Perfect

She has worked at school -то перевод совершенно другой Она проработала в школе , поэтому правильное предложение 1!

2 By 3 o'clock they had finished the expedition.

3 The whole day yesterday the radio was broadcasting news about the flood.

4 We had solved the problem before the explorer arrived.

5 When disaster stopped, all people were sleeping.

Объяснение: