These articles______ the problems of the modern world, including race relations and community development.
32.—You are so strong. —Yes,I often________in the gym.
31.—Bad luck! I have left my dictionary at the dormitory. —__________.
30.The extra room________very useful when we had visitors.
29.Don’t touch anything.Better leave things_________they are until the police arrive.
28.You can ask him again if you like,but it won’t make any __________he will still say no.