1.This math problem is___.He can work it out___ a easy/easy

1.This math problem is___.He can work it out___ a easy/easy b easy/easily ceasily/easy
2.I can't sit ____Mary.She is tall
a near b in front of c behind
3.Look ,the boy are playing___basketball and girls are playing__a ball
a / b the /with c / with
4.____interesting books they are!
a What b What a c How