35.The World Wide Fund for Nature is an organization ______ aim is to protect wildlife.
A. who B. where C. which D. whose
34. I asked which of the books _________published in Hong Kong.
A. that was B. was C. that were D. were
33.________English is spoken all over the world, there are lots of varieties.
A. Though B. Once C. Unless D. Since
32.You should tell the police ______ your bicycle is stolen.
A. while B. in case C. if D. so that
31.-He is said ______ in the States for three years.
-No wonder he speaks English so well.
A. to have stayed B. to stay C. having stayed D. staying