I am very sad that I ______ many chances in the last few years.
—Look at the man in the classroom! Is he Mr. White?—No, it __________be him. He’s eating in the dining hall.
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 __________.