在英语越来越重要的21世纪，学好英语成了每个大学生的首要目标。为帮助大学生更好地掌握英语专业知识，特提供以下资料：
1. During the summer holiday season there are no _____ rooms in this seaside hotel.
A.empty
B.blank
C.deserted
D.vacant
2. Drive straight ahead, and then you will see a _____ to the Shanghai-Nanjing Expressway.
A.sign
B.mark
C.signal
D.board
3 . Whenever possible, Ian _____ how well he speaks Japanese.
A.shows up
B.shows around
C.shows off
D.shows out
4. The tenant left nothing behind except some _____ of paper, cloth, etc.
A.sheets
B.scraps
C.pages
D.slices
5 Shares on the stock market have _____ as a result of a worldwide economic downturn.
A.turned
B.changed
C.floated
D.fluctuated
6. I think you can take a(n) _____ language course to improve your English.
A.intermediate
B.middle
C.medium
D.mid