The reason why he failed is ________he was too careless.
Go and get your coat. It’ s ________you left it.
The problem is _________to take the place of Ted.
What I want to know is ______ he likes the gift given by us.
That is ______ Lu Xun once lived.
That is __ ___ we were late last time.
She looked _________ she were ten years younger.
—I fell sick!
—I think it is _______ you are doing too much.
China is becoming stronger and stronger. It is no longer_________ .