While i (to copy) the exercise, my friends (to describe) a picture. 2)when we came in, the children (to clean) their desks.3) we met her at the bus stop. she (to wait) for the bus. 4)some of the children (to ski) while other children (to skate). everybody (to have) a lot of fun. 5)when we came the family (to get) everything ready for christmas.  bob and helen (to decorate) the christmas tree.6) the girls (to feed) the birds in the garden while the boys (to make) a bird-house.
в вопрсителтную форму !

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ответ:

while i was copping the exercise my friends were describing a picture. when we came in the children were cleaning the desks. we met her at the bus stop. she was waiting for the bus. some of the children were skiing while other children were skating. everybody had a lot of fun. when we came the family were getting everything ready for christmas. bob and helen were decorating the christmas tree. are the girls were feeding the birds in the garden while the boys were making a bird-house.

объяснение:

если я правильно поняла, то нужно было поставить в нужное время?