这题选什么?73.The police had difficulty in ____ the fans from rus

几道专四问题答案我都有,只是能理解为什么是那样,谢谢1：The police had difficulty in ___ the police had to set him free in the ____ of evidence that Because of the noise outside,Nancy had great difficulty ____ She had great difficulty in understanding the lecture,you he Because of the noise outside,Nancy had great difficulty (in) The teacher_____ that his students had difficulty in English You can not imagine the difficulty they had ____ the problem 28._______ great difficulty I had ________ the robber from b With a local guide _____ the way,they had no difficulty ____ When he realized the police had spotted him,the man ____ the I had great difficulty ——the suitable food on the menu in th With the old man _____ the way,we had no difficulty in findi