There is a kite _______ the tree. [ ]
A. on
B. in
C. at
答案：B
--- What do you think of Internet?
--- I often chat with my friends on line. I can’t imagine my life ______ Internet.
A. without B. with C. on
人工开挖临近设计高程时，应留出( )的保护层暂不开挖。
A．0.1m B．0.2mC．0.3m D．0.2～0.3m
