二、 单项选择（共15题， 每题1分，共15分）
( ) 21. There is _______big desk in our classroom. _______desk is for our teacher.[21世纪教育]
A. a, The B. a, A C. the, The D. an, A
( ) 22. How many rubbers_________ in your pencil box?
A. there is B. there are C. is there D. are there
( ) 23. He less time reading stories about film stars than before.
A.takes B.spends C.costs D.pays
