The total combined income of 48 countries in Africa is only a little more than _____ of Belgium.

----When can we go to visit you?---- Anytime you feel like ______.

 --- How do you find your new classmates?----Most of them are kind, but _______ is so good to me as Bruce.

(2013·浙江高考)Half of ________ surveyed in 16 countries say they go first to their closest friend to share their deepest wishes and darkest fears.

Life in the 21st century is much better than_____ used to be.