---“Each of the students, working hard at his or her lessons,_____ to go to university.” ----“So do I.”

---What ____ the population of China ? ---China has a population of 1.3 ____.

What the science teacher does and says _________ of great importance to college students.

How close parents are to their children ________ a strong influence on the development of the children's characters.

We collected a lot of books to get the necessary information but only half _________helpful, so we failed to finish the work.