第二部分：词汇知识运用(共两节，满分30分)
第一节：多项选择(共10小题；每小题1分，满分10分)
21．The girl looked at me with a ________of enjoyment and discouragement, so I felt a little puzzled.
A. connection B. combination
C. mixture D. mass
22．It is the prevention of disease ________its successful treatment that has led to the rapid increase of the world's population.
A. more than B. rather than
C. other than D. less than
23. The disaster took away his family，but with a strong will he finally________.
A. picked up B. pulled through
C．got across D worked
24．—Some countries are taking actions to occupy the islands of the South China Sea.
—Yes, but I think they ________ be punished sooner or later.
A. could B. can
C. may D. shall
