If you want to get good grades, ____________, you should listen to the teacher _________ in class.

David, how old is your father this year?—______. And we just had a special party for his _____ birthday last weekend.

______ number of the students in Class 1 ______ forty-four.

baseball is lost, he can’t find .

I like getting up early in the morning. You know the morning air is so good .