61.there is no rain, farming is difficult or impossible.
答案解析
解析：
相关题目
149.We all know that arrows are often used asto show directions.
148.On my journey by car across the European continent, I enjoyed looking at the of the variouscountries.
147.As the manager1 s private secretary, Helen has easy to all his correspondence.
146.of the twins was arrested because I saw them both at a party last night.
145.The students in that university are not fewer thanin our university.
144.His new appointment takesfrom the beginning of next month.
143.The managing director took thefor the accident, although it was not his fault.
142.I don＇t thinknecessary for Julie to make such a fuss about that sort of thing.
141.Tomorrow I＇m leaving for New York and I＇ 11 stay there for.
140.Many companies are seeking to exploit and develop the rich naturalin the west region.
