二、下面有一些单项选择，看看谁做得最好，要认真考虑啊！（每小题1分，共15分）
( ) 1.There _________a lot of fish in the water.
A. is B. are C. have D. has
( ) 2.There is _______big desk in our classroom. _______desk is for our teacher.
A. a, The B. a, A C. the, The D. an, A
( ) 3. They go to school five days _____ .
A. week B. a week C. weeks D. in a week
( ) 4. Do you go to school _____ seven thirty ?