—Look! A book is on the floor. Whose is it?
—It ______be Rick's. It has his name on it.
A. mustn't B. can't C. must D. need
—______ hard Tony is working!
—Yes. We should learn from him.
A. What B. How C. What a D. How a
It's 9:30 pm, children! ______ is time to go to bed.
A. That B. It C. This D. They
Attention please. The plane will ______ in five minutes.
A. take out B. take after C. take off D. take care
There are many flowers and trees on ______sides of the Century Road.
A. each B. every C. both D. all
—Do you know Tom?
—Sure, we have ______in the same village for many years.
A. left B. lived C. come D. gone
