Through thorough investigof polluted water.

I heard they went skiing in the mountainslast winter.— It ________ true because there was littlesnow there.

____ the blackboard! What can you ____ on it

Now children turn to Page_____ and look at the _____picture in Lesson Two.

— You shouldn’t have talked back to our teacher like that. It was awfully impolite.— You are right. I ______ crazy at that moment.[ ]