----The light in the room is still on. Do you know_______?----In order to prepare for the coming exam.
He ______finish his homework before 12 o’clock.
You can choose _____book you like in the library.
He went to the garden and saw ________ one-year-old baby on the grass.
You can’t get back your football_________you finish your work.
Look! The train is going _______ the tunnel.