Ⅰ. 单项选择(30分)
( ) 1. Jenny goes to school on foot. It takes her about half _____ hour to get there.
A. an B. a C. the D. /
( )2. Please _____ these things to your brother. He is at school.
A. bring B. look
C. take D. watch
( )3. —Look! Kate is so beautiful _____ that green skirt.
—Yes, she bought the skirt _____ a reasonable price.
A. on; in B. in; at
C. at; at D. at; on