I an old photo while tidying up my study, which reminded me of my happy childhood.
He’s so ill that his father has to send for _______ doctor.
Jumping out of _______ train running at a speed of 200 kilometers per hour is quite _____ dangerous practice.
________ your spirits. Try again and you’ll succeed.
As soon as Mr. Li came in, he asked Joan to ________ the books around the class.
Dogs are kept to ______ the houses from thieves at night.