The twin brothers stand under the tree, ______ and say nothing.
It's ________ me why Alice gave up her job and got married.
Some warned that the step the US government has taken to cope with the current crisis is ________ much risk.
—It is said that Jack is very rich and is always changing his private cars. What is he?—________, I am not sure.
Facing the global financial crisis, the Chinese government has taken many measures ________ people's life to deal with it.
—She got her first science fiction published. It turned out to be________.—When was that?—It was in 2009 ________ she was still in college.