Our teacher asked _________ .

More and more people prefer ______ in the wild _____in the hotel. Because they want to experience life.

______ you______ your homework yet –Yes, I _____ it just now.

It is known to all that every minute _____ full use of ______ the lessons will benefit students a great deal [ ]

ggest whale is _____ blue whale, which grows tobe about 29 meters long—the height of ____ 9-story building.