There is someone knocking at the door. Who ______ it be?
American students have ______ weeks ______ in summer holiday than Chinese students.
---Most of us are looking forward to the _____________ trip to Nanjing .--- I agree with you.
Nobody teaches ______ English. I learn English by ________.
---What did you do last night? ---I didn’t play the piano, _______, I watched a film with my parents.
He spends as much time as he can ____ English every day.