问题描述：
79.He is afraid _______the narrow bridge because he is afraid _______ into the water.A.to cros
79.He is afraid _______the narrow bridge because he is afraid _______ into the water.
A.to cross,of falling B.of crossing,to fall C.to cross,to fall D.of crossing,of falling
79.He is afraid _______the narrow bridge because he is afraid _______ into the water.
A.to cross,of falling B.of crossing,to fall C.to cross,to fall D.of crossing,of falling
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