一、单项选择。 (每小题1分，共15分)
( ) 1．Here is my suggestion; You can learn a foreign language well______．
A．by using B．to use C．by using it D．from use it
( ) 2 As a student,he always contrates studying in his math． A．on B．of C．with D．in
( ) 3．Our students should keep ______ in the reading-room．
A．quiet B．quietly C．quite D．quickly
( ) 4．----How have you dealt ______ the rubbish? ----I have thrown them away．
A．at B．in C．with D．on
( ) 5There is ____ boy pouring waste water into the river。
A．an 8 years old B．a 8-years-old C．an 8-year-old D．an 8-years-old
( ) 6．------I’m sorry, this kind of PSP is too expensive．I can’t afford ______ it．
------It’s OK． A．buy B．bought C．to buy D．buying
