Peter didn't go to school yesterday because he was _ dentist's ​

Peter didn't go to school yesterday because he was at dentist.

ответ: at

Объяснение:

tom turned his pockets inside out, however didn't found any cent. he appeared just at the end of a party and right away asked for a cup of tea and a peace of cake. and now, switch off the tape-recorders and take notes of what you heard. practice of playing the piano appeared to be not interesting as it usually is. i would like you to make the sound of tv set a bit quieter.

ответ: 1-a) we  should not  burn  garbage.  it.            2- c) plants  growing  in the sea            3-c) greenpeace  protect  the oceans,  rivers, seas  and lakes            4-c)  we can  help the animals  if  we do not  cut wood            5-a)  we can help  the fish  if we do not  pollute the  oceans, rivers  and lakes