【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】In the phrase " these two big stone bridges", the center is__________.
【单选题】At the gate _______ two stone lions.
【单选题】The Great Pyramid is made _____ of two million stones and each stone _____ more than two tons. [ ]
【单选题】The building ______ stone and each stone ______ more than two tons (吨). [ ]