题干
With a lot of difficult problems_____________, the newly-elected president is having a hard time.
A：settle
B：setteling
C：to settle
D：being settled
答案(点此获取答案解析）
C
个候选城市中建
个直销店，且在同一个城市建直销店的个数不超过
个，则该企业建直销店的方案种数为( )
