After five days of fantastic space trip, the two astronauts walked out of the spaceship, _____.

 The audience were ________ by his ________ performance on the stage.

With its economy in great stress, Chinese government is now          for a way out and looking forward to a new stage in 2011.

I __________ the names of plants.

Internet is a great tool if we know how to use it ,but it shouldn’t be a replacement for ______life.