1. составьте предложение по образцу образец : •what are you doing? (cook) •i am cooking. i have been cooking for an hour. 1. what are you doing? (write) for twenty minutes. продолжение на листочке! сделайте быстро) заранее !

ответ:

2. i am cleaning the kitchen now.

i have been cleaning it for two hours.

3. i am waiting for him.

i have been waiting for him for ten minutes.

4. i am learning new words.

i have been learning them for thirty minutes.

5. i am doing a crossword puzzle.

i have been doing ir for fifteen minutes.

объяснение:

в першому реченні використовується present continues

в другому present perfect continues

we have become more dependent on chemicals.  and, strangely, we hardly notice anymore. every single day we start and finish by using a product that has at least 10 different chemicals in it: a toothpaste. later, we take a shower using several products (shampoo, conditioner, body wash, lotion). the names of the chemicals in all these products will take a few pages to list. later on, we eat chemically enhanced food, packaged in plastic.  we wear and sleep on synthetics, we drink and eat foods that are drastically modified with chemicals.  all these innovations have been introduced less than 50 years ago, just two generations have been around so many chemicals lately.  and, scarily enough, we hardly notice anymore.

дополнительные  школьные мероприятия  являются частью  школьной жизни.