Какая часть отсутствует в сложных словах: - child, - day, -friend, -house, -teacher?

  how long have you been trying to find a job?

for three years. it was really difficult.

how many jobs have you had?  

about thirty, maybe more i have been doing everything.

how long have you been standing here today?  

i have  been waiting since 8: 00 this morning, and i'm freezing.  

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