_______ about wild plants that they decided to make a trip to Brazil for further research.

____ 1960s, ________ number ofhabitants here is very _______ ,and it was since the middle of 1970s that thepopulation has been increasing rapidly.

He speaks _________English _______ French .Instead ，he speaks German.

Hi, _________ are you going —To the zoo. I want to see some animals.

I’m afraid I’ve broken the chair. —__________, I can easily get it fixed.