二、单项填空（共15小题；每小题1分，满分15分）
21. In ______ new comedy series Hot Mom, which just finished airing two weeks ago, Sun Li became, as the title indicates, ______ hot mother.
A. /; a B. the; a C. the; the D. a; a
22. ---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
23. ---Why hasn’t Jane arrived yet?
---She ______ again in the morning.
A. shouldn’t have overslept B. may have turned off the alarm clock
C. must have no one to call her D. should have someone to wake her up
24. The forest guards often find campfires that have not been ______ completely.
A. turned down B. put out C. put away D. turned over
25. ---Could you ______ take care of my dog while I’m away?
