问题
选择题
The keeper of the spring cleared away the leaves and branches, and wiped away the silt(淤泥) that would _______ have choked and polluted the fresh flow of water.
A．thus
B．otherwise
C．therefore
D．later
答案
B
题目分析：A. thus因此，B. otherwise否则，C. therefore因此，D. later后来，句意：泉水的守护者清除了树叶和树枝，挖掉了如果不去掉就会堵塞污染清澈的水流的淤泥。这里用otherwise相当于if it hadn’t been wiped away，所以选B。