A. should          B. must                 C. will                  D. can

27.The World Wide Web is sometimes jokingly (开玩笑地) called the World Wide Wait because it ________ be very slow.

A. in         B. at        C. of        D. on

―Yes, it is ________ a 1990s style.

26. ―Your hair style is quite different.

25. _____the students in the primary school is about three thousand, _____of them are girls.
   A.A number of; two third  B. The number of; two thirds
   C.A number of; two thirds  D. The number of; two third

A. rooms      B. area      C. place       D. space

24. More and more birds are in danger because they don’t have enough living _______.

C. more hardly, the fewer                                    D. harder, the fewer

A. more hardly, the less                                       B. harder, the less