(2013·浙江,11)Half of ________ surveyed in 16 countries say they go first to their closest friend to share their deepest wishes and darkest fears.
There are over 58, 000 rocky objects in __________ space, about 900 of which could fall down onto __________ earth.
Experts think that __________ recently discovered painting may be __________ Picasso.
I woke up with __________ bad headache, yet by __________ evening the pain had gone.
As is known to all, __________ People's Republic of China is __________ biggest developing country in the world.
There is no __________ swimming-pool in this school and the students often go to swim __________.