单项选择题

Government cannot operate effectively（）it is free from such interference.

A. so long as
B. so that
C. unless
D. because

<上一题目录下一题>

热门试题

填空题

What do the Garden’s Guides do every day at 11 am and 2pro They show the tourists ______ the Gardens.

单项选择题

A. Interviewer and interviewee.
C. Manager and secretary.
B. Employer and employee.
D. Seller and buyer.