The child tiptoed quietly to the bird.___into the forest when he was about to catch it.
Barack Obama was very happy when many supporters voted ________ him.
The number of smokers in China ________increased in recent years, and a number of them _________ the youth.
It is generally accepted that __________ boy must learn to stand up and fight like _______ man.
The driver wanted to park his car near the roadside, but was asked by the police _________.
In the global economy, a new drug for cancer, _________ it is discovered, will create many economic possibilities around the world.