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Wefoundtheriverdangerous.A.toswimB.toswiminC.swimmingD.forustoswim注意:river与dangerous之间为什么不加was?大概与截题有关

题目详情
We found the river dangerous _______.
A.to swim B.to swim in C.swimming D.for us to swim
注意:river与dangerous之间为什么不加was?大概与截题有关
▼优质解答
答案和解析
B 要加上介词in