说明：本试卷共八道大题8页，满分120分，90分钟完成。考生将I卷的选项填在后面的答题卡中。
第I卷 (选择题共50分)
I.单选题，共1５小题, 计1５分)
( ) 1. His father is engi neer. He designed such useful machine
A．a an B. an a C. an an D. a a
( ) 2.The building is the second in our town。
A high B highest C higher D the most highest
( ) 3.Every day we spend half an hour morning exercise。
A do B to do C for doing D doing
