一、单项填空（15%）
( ) 1. All the students agreed to go to Qingdao by _______ sea and camp by _______ sea.
A. the; a B. / the C. /; / D. a; the
( ) 2. Do you know how long the meeting has _______?
A. lasted B. held C. over D. begun
( ) 3. Now mobile phones are not so expensive as they _______ to be.
A. use B. used C. are used D. were used
( ) 4. What was the boy searching ________?
A. for the Internet B. the information for the Internet
C. for on the Internet D. Internet
