There are _______ many books _______ I don’t know which to choose.A. so; that B. such; that C. too; that
— Hi, I ____ Tony. _____ you Helen? — Yes, I am.
— How ______ Jack? — He is fine.
— What’s this? — It is .
— ______, please. — K-E-Y.
— _____ is this pen? — It is white.