PART ONE .Vocabulary and Structure (10 points, 1 point for each item)从下列各句四个选项中选出一个最佳答案，并在答题纸上将相应的字母涂黑。1. It is time now to learn _ to protect our atmosphere, the roof over the world of man.A. what B. which C. how D. that2. Association refers _ taking the material we want to remember and relating it to something we remember accurately. A. in B. to C. up D. by3. Tomatoes _ love apples and were supposed to make pe
