_______ is well known is ________ the Diaoyu Islands have been part of China since ancient times

itor-in chief asked me to write an article forhim, ______ about AIDS patients in China.

He chose to teach in a western province, though he ______ in the city for a better life. [ ]

The report noted that nicotine breathed inby a smoker increased the need of the heart ________ oxygen

On his way to the airport,it________him all of a sudden that he had forgotten his passport.[ ]