＿＿can you find out how many chickens there are!

The light in his office is still on. Do you know _______—To prepare for the material(材料) the meeting will need tomorrow, I think.

We all know travel can ______ our knowledge of the world.

May I have some milk— Sorry, we have only _____ left.

Shang Hai is larger than _______ in Jiangsu.