---Lucy, what were you doing at nine last night?---I ___________ the piano. I usually practice the piano at that time.
–What are you busy with these days?-- I ______ study for the coming English test. You know, I’m not good at it.
– _______do you know our country will build the space station?-- I’m not sure. Maybe in six years or seven.
-- When did your mother know about your score?-- She knew nothing _____ I told her.
The football team needs more _____. It isn’t doing very well.
-Dad, the phone is ringing. I guess you ___________ on the phone.-Wait a minute.