_____ life exists on any other planet in the solar system still remains a question.
As is known to all, China _______the group of developing countries.
We find _______ difficult to talk to him about anything serious.
—Thank you for joining in our conversation tonight.—_____.
MoYan, _______ Chinese writer, has won the2012 Nobel Prize in Literature, which is _______ great surprise.
–We’re going to visit our teacher this weekend, would you like to join us?—______. I’d love to.