Is _______ necessary_______ the workers wear uniforms at work?A. it, for B. this, to C. it, that
I’m ________ in the book. Do you think it very ________?
—You are wearing a blue dress.How beautiful it is!—_____________________
Don’t forget ________him about it.
This kind of flower is _______ than that one.
----Happy birthday to you, Brian! ----_______