单项选择题
______ we know, a lot of people with disabilities have been very successful in many fields.
单项选择题 This will ______ pressure on the trains to some extent.
单项选择题 The teacher ______ that Li Ling be our monitor.
单项选择题 Life was extremely hard in the past. My grandmother had no chance to go to school, even the ______ school.
