委托任务和组织活动是属于（ ）。

(单选题)China ______ 56 ethnic groups. (单选题)We passed areas of open grassland on which a flock of ______ (单选题)Nowadays pets ______ as family members by many people. (单选题)The play is neither as interesting ______ as attractive as w (单选题)The locals here are all very hospitable so ______ people in (单选题)There ______ a watermelon and several apples in the basket. (单选题)I have read ______ of these books since last year. (单选题)We should always keep it in mind that ______ selfish we are, (单选题)I prefer ______ second girl who speaks ______ clearly and sm (单选题)The last paragraph is mainly talking about Chinese responsib