He . documents by the time the boss came.

В данном предложении посмотрим на время, да и на само задание:

Скажем, что в данном случае нет отрицания и тут время Past Perfect!

Значит получаем такое предложение:

He  had prepared documents by the time the boss came.

1)always i go  to  school  by bus.2)sometimes he does the washing-up.3)what  time  do  you  usually  getup? 4)ann  never  goes  to  bed late.5)i  go  to  the  club  at  half  past seven.6) how    do  you  usually go to  school.

if i could, i would choose to volunteer as a designer or an architect helper in singapore. i am fascinated by that little country. i believe, that it is the most beautiful place in the world. its contemporary architecture and urban planning is not comparable to any other countries. volunteering in singapore, would also contribute to my future career. i want to be an architect, and there is no other city, where architecture is developing that fast, and at that grate scale. as for a future architect, i do not know better country, for volunteering then a singapore.

p.s.

если вам нужна , что бы перевести мой текст выставите эту просьбу, как новое . с уважением , маша