--What do Li Lei’s parents do?--They _________ doctors.

I’d appreciate ________ if you could let me know in advance whether or not you will come.

He is not full . He wants to eat _____ piece of bread .

—You seem not to be        today, Jane. What’s up?—     in particular; only a little headache .

Let’s paint one side of the paper red, and _____ side black.