第一节：单项填空（共20小题；每题1分，满分20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. 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. --- Red or white wine, Bob?
--- Oh, either.________. It doesn’t matter to me.
A. That’s ok B. I’m sorry C. It’s a pity D. It’s up to you
23. ______ which university to attend, the girl asked her teacher for advice.
A. Not knowing B. Knowing not C. Not known D. Known not
24. ______ we have enough evidence, we can’t win the case.
A. Once B. As long as C. Unless D. Since
25. ---It rained cats and dogs this morning. I’m glad we took an umbrella.
---Yeah, we would have got wet all over if we ______.
