第一节：单项填空（共20小题，每小题0.5分，满分10分）
21. My father asked me to go on ______ walking tour, but I don’t think I’ve got ______ energy.
A. a; a B. the ; the C. /; the D. a; the
22. I had been so _________ with my work that I forgot to buy a gift for my daughter’s birthday, which I had promised to.
A. occupied B. devoted C. accompanied D. buried
