问题
选择题
These stones, each _____ as much as four tons, came from the Alps Mountains.
A．weighed
B．weighs
C．to weigh
D．weighing
答案
答案：D
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These stones, each _____ as much as four tons, came from the Alps Mountains.
A．weighed
B．weighs
C．to weigh
D．weighing
答案：D