第二部分 英语知识运用（共两节，满分45分）
第一节 单项填空 （共15小题；每小题1分，满分15分）
从Ａ、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21. --- ______ that he managed to get the information?
--- Oh, a friend of his helped him.
A. Where was it B. What was it C. How was it D. Why was it
22. Only when I left my parents for Italy how much I loved them.
A. I realized B. I had realized C. had I realized D. did I realize
23. ---Why didn’t you attend the party last night?
--- I _________ my sick sister at home.
A. looked after B. had looked after C. have been looking after D. was looking after
24. The forest guards often find campfires that have not been ______ completely.
