---Have you finished your work _____?---Yes, I have. I’ve always finished it.
—You aren’t a stranger, are you?—____, don’t you remember ____ me in Mr Black’s office yesterday?
Wearing white can help people _______when they feel stressed.
You’d better wear a pair of comfortable trainers when ________a long walk.
一Look! That teacher is explaining something to her students again and again!一_______teacher she is!
Though he got up early, ______ he missed the train.