It is said that the number of Chinese characters users can type on their mobile phones is ______ the total number of Chinese characters. The reason is that the character input systems are made by foreign cell phone producers. 
| A．25 percent as less as | B．less than 25 percent |
| C．25 percent much than | D．25percent as much |
— Do you know the tower _____ in the heart of the city?
— Do you mean the one _____ to the north of the city library?
| A．locating; lay | B．located; lying |
| C．being located; lying | D．located; lay |
Canada is one of _____ largest countries in the world, ______ second only to Russia．
| A．the; the | B．the; a |
| C．a; the | D．the; 不填 |
The telephone _____ three times in the last hour, and each time it _____ for my sister.
| A．had rung; was | B．has rung; was | C．rang; has been | D．has been ringing; is |
Everyone knows that Canada is the second largest country in the world, larger than _____ country in Asia.
| A．any | B．any other | C．other | D．another |
By all _____, you must try every _____ to help him.
| A．mean; mean | B．means; means | C．means; mean | D．mean; means |