21. —His long______ speech made the audience very______.

—No wonder many people fell asleep.  

A. tiring; tiring       B. tired; tired

C. tiring; tired            D. tired; tiring

22. New Zealand is an important agricultural country, with cattle farming on the North Island,______ the hilly South Island has more sheep farms.

A. while    B. but      C. besides D. when