She will tell us why she feels so strongly that each of us has a role ________ in making the earth a better place to live. [ ]

All teachers ___ little of his way ___ the problem, which inspired him and gave him hope to try __ second time.

________ Tom ________ Mary speaks good Chinese, sothey can communicate with these Chinese students very well.

Unlike watching TV, reading is a highly active process _______ it requires attention as well as memory and imagination

—______ made her ashamed of herself—________ the lowest mark in her class.