Mike is only 15 years old. He is not ______ to get a driver’s license(驾照).
At present, the students in China take more exercise. Most of them are ______ than before.
—What a beautiful key ring! __________is it?—Only 5 yuan.
Jack will have a math test this afternoon. He needs a__________.
You are old enough to make decisions by __________.
There is __________backpack on the desk. It belongs to Tom.