Where __ you __ the key? I ____ it yet.
– Fancy seeing you here at this time! -- ____
I strongly recommended that more phrases ____ use of in his composition.
____ again and again, the sayings have been learned by heart so far.
He was on the point of setting off for Shanghai ____ his girl friend called him.
My friend asked me to play ____ volleyball, but I’m tired and I don’t think I’ve got ____ energy.