I have bought 2 ballpens, _______ writes well.
_You should think _______yourself instead of just obeying others.
_This year the white ducks are no longer lovely in locals’ eyes, ______ their fear of bird flu.
_I like to have my photos taken_______there are mountains and rivers.
_You’d better take something to read when you go to see the doctor_______ you have to wait.
_A Chinese runner,Liu Xiang,rushed to the ending line _______a surprising speed.