The number of _____ species increases every year with their natural habitats disappearing.
The teacher as well as the students _______ planting trees.
_______ is known to all, smoking is harm our health.
__ surprised me most was ___ Mary spoke Chinese just like a native speaker.
--- Would you mind my opening the window. It is too hot.---- .
---- People are in great need of this kind of food.----Yes. It’s really a problem that how to _________ the needs of them. A give B. gain C. satisfy D. produce