Billy is a nice boy . he knows a lot , but he never ________.
---What’s your Chinese teacher like?--________.
---Mike says “________” to his parents before he goes to bed every day.---He is a good boy.
---What _________ do you want to buy?---Nothing. Thanks.
My classmates and I ______.
---It’s 9 o’clock in the morning now. The supermarket is _______.---Let’s go and buy some food.