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)
请认真阅读下面各题，从题中所给的A、B、C、D四个选项中，选出最佳选项。
21. Having lived in China for 8 years, Helen has ____ good command of
_____ Chinese language.
A. the ; / B. a ; a C. the; a D. a; the
22. The description of these events _______ other accounts written at the time closely.
A. contributes to B. subscribes to
C. corresponds with D. submits to
23. you’d better take down all the key points ______the memory is still fresh in your mind.
A. unless B. while C. before D. until
24.---- Your daughter is in her thirties. I can’t understand ______ married again and again.
---- Now she is at the peak of her career. Work means more to her than anything else.
