— _____ is this pen? — It is white.
He often says, “I ____ one million smiles in my heart _____ one billion dollars in my pocket.”
—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!