mothers can’t come to the meeting because they go to Beijing.

.She will tell us why she feels so stronglythat each of us has a role ______ in making the earth a better place to live.

What do you think of the concert?——I really enjoy it. I didn’t expect it was ____ wonderful.

The police tried to protect the foreign officers ____ personal injury.

hat do you think of genetically modified food (转基因食品) —We all think ______ is careless ______ somescientists to say it is safe before doing any experiment.