Помогите пожалуйста с заданием!!!+100500 к карме)Поставить глаголы в подходящую форму buy

Помогите пожалуйста с заданием!!!+100500 к карме)
Поставить глаголы в подходящую форму
buy invite write spend cough publish send
1)not all the...people could come to the party
2)when i came into the classroom? i saw my classmate ....on the board
3) the letter...today will be received in a few days
4) my yonger sister has already eaten all sweets....some days ago
5) the time ...in the camp will never be forgotten
6) the boy...for several day decided to go to the doctor
7) oxford dictionary....in GB is necessary for many students