There is_____________ elephant in the zoo,___________ elephant is from Africa.
---Whose book is this? ---It ______ be Linda’s. It has her name on it.
There are ______ flowers in the square during the National Day.
---How do you learn English? ---I learn watching English videos.
---Did you get there by ______ bike?---No, I took ______ taxi.
—Would you like to go out for a walk with us? — ,but I must finish my homework first.