Whose shirt is this? Is it Tom’s? —No, it isn’t, ______ is white.
John is in a bad mood these days. Do you know why?—His grandfather has just passed away. Let’s try to _______.
The students should take the exams__________ .
You_________ get up at once, or you’ll be late for class.
The students were excited when they knew they ______ out for a spring out the next month.