II．单项填空（共15小题；每小题 1分，满分15分）
从A，B，C，D三个选项中，选出可填入空白处的最佳选项。
21. – Little Tom got an “A” in the exam.
-- _____he has been so happy these days.
A. No wonder that B. I wonder why
C. It’s wonder that D. Because
22. _____you call me to say you’re not coming, I’ll see you at the theatre.
A. Though B. Unless C. Until D. Whether
