here are four basic _____ of blood inthe human body. What do you belong to, A, B, AB or O

He decides to work _______ than last year.

This is the school ____ we visitedthree days ago.

s thelady standing over there－I am notsure, but it may be ___ from the provincial government

I suggested my mother that she _____ a drawing club after her retirement from teaching.[ ]