Nearly four hundred supermarkets in Beijing are preparing to dim(使暗淡) their lights ________ the "Earth Hour 2010" on Saturday night.
—Miss Wang,I feel very nervous with the competition approaching.—________. As long as you can finish it,it is a victory.
Since our country has so many good table tennis players, we have to ______ the best ones to take part in the game.
— What has Jack been doing recently?—I don’t know _____ care.
Such a custom came into _______ long ago.
His parents wouldn’t let him marry anyone ______ family was poor.