【单选题】The boys often used to throw a stone or two at the glasshouse because ______.
A.
they hated Mr. Flowers
B.
they only wanted to play a joke on Mr. Flowers
C.
Mr. Flowers didn't let them watch flowers
【单选题】目前遍布于校园、企业的网络主要属于( )。
【单选题】The Great Pyramid is made _____ of two million stones and each stone _____ more than two tons. [ ]