Заполните таблицу. Экологические факторы Примеры Биотические Антропогенные

При скрещивании между собой черных мышей всегда получается черное потомство. При скрещивании между собой желтых мышей одна треть оказывается черной, а две трети – желтой. Как можно объяснить эти результаты?

Закончите предложения, поставив глагол в скобках в правильное время - Past Simple или Past Continuous.

Yesterday my friend ... his exam. (pass)

What ... he ... at 11 o'clock last night? (do)

Sam ... over the phone when someone called his name. (talk)

Last week I ... him a letter. (write)

Last time I ... them was a few years ago. (see)

Задайте вопрос к выделенному словосочетанию.

This time yesterday Mary was playing with her little brother.

When it stopped raining John went out for a walk.

My friend bought a new dress last weekend.

The old man fell asleep while reading a newspaper.

Dave was sleeping on the couch when somebody knocked at the door

Составьте отрицательные предложения, поставив глагол в скобках в правильном времени - Past Simple или Past Continuous.

I ... there when the accident happened. (be)

My TV is broken. I ... any news at 8 o'clock last night. (watch)

Jemma ... yesterday. She was ill. (work)

Tourists ... the museum yesterday because it was closed. (visit)

They ... golf at 10 o'clock this morning. (play)