Neighbors _________ to the police about the dogs barking at midnight, but it didn’t work.
It is said that the iron and steel works _____not far from here, but now there ______no means of finding it out.
In my opinion, mathematics _____fun, but more than 80% of the group _____agree with me.
Twenty years _____ passed since I came to this school, but I feel twenty years _____a short time in my life.
---- What do you know about the population of China? ---- It _____ over 1,200 million and 80 percent of it _____ peasants.
It will take _____ time to finish the project.