76.read改为reading 77.a 改为an 78.succeed改为success 79.need改为needs 80.understand改为understanding 81.separate 改为separately 82.what前加whether 83.正确 84.it去掉 85.as 后加to
略
76.read改为reading 77.a 改为an 78.succeed改为success 79.need改为needs 80.understand改为understanding 81.separate 改为separately 82.what前加whether 83.正确 84.it去掉 85.as 后加to
略