第二节语法填空 (共20小题，满分30分)
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为26～45的相应位置上。
A
Nobody before Jane fully understood chimp ____26_____(behave). She spent years observing and recording their daily activities. Since her childhood she ____27____(want) to work with animals in their own environment. ____28______, this was not easy. When she first arrived in Gombe in 1960, ___29____ was unusual for a woman to live in the forest. Only ____30______ her mother came to help her for the first few months was she allowed to begin her project. Her work changed the way people think _____31_____ chimps. For example, one important thing she discovered was that chimps hunt and eat meat. Until then everyone had thought chimps ate only fruit and nuts.She _____32___(act) observed chimps as a group ____33____ (hunt) a monkey and then eating it. She also discovered ____34____ chimps communicate with each other, and her study of their body language helped her work ___35___ their social system.