Chris is very clever and never wastes any time doing useless things．—No _______ he always comes first in the examinations

Do you have any ideas ________ is actually going on in the classroom?

Why did you put these photos on your desk? —Because they can ______ me of my old classmates and friends.

He is talking _______ the man _______ you. [ ]

your sister have a computer?—Sorry, I don’t think she has .