Ⅰ、Choose the best answer.(选择最恰当的答案，用A、B、C或D表示填入括号内) （共20分）
( ) 1. My cousin get up ______ half past six every morning.
A. On B. In C. At D. with
( ) 2.If you have lost the book of the library, you must ____ it .
A. pay to B. pay for C. cost of D. cost from
( ) 3.The witch came ______ with an idea at last .
A. at B. to C. on D. up
