1. Соотнесите слова и их объяснения :
2. Употребите глаголы в Passive Voice :

1. environment - cpopulation - gpoison - dpollution - eshortage - adump - fnuclear - hweapon - b2.The work should be finished by us in two daysLittle boy was left at home by his parentsEnglish books are often bought by usMany letters are written by meThe flowers are always watered by boyA tent should be put up on the bank of the river by us