第一节  单项填空
  从 A、B、C、D 四个选项中,选出一个能填入空白处的最佳答案。
  1.—Shall I carry the box upstairs for you?
   —______.I can manage myself.
  A.Thanks a lot                  B.Thank you                 C.No, thank you            D.Yes, thanks
  2.—Alice, why didn't you come yesterday?
   —I______, but I had an unexpected visitor.
  A.had                           B.would                       C.was going to              D.did