____ is clear ____ the Diaoyu islands have been China's inherent territory (固有领土)both from historical and legal aspects since ancient times.
(2013·山东,28)________ I have to give a speech, I get extremely nervous before I start.
I had hardly got to the office ______ my wife phoned me to go back home at once.
I have heard a lot of good things about you ________ I came back from abroad.
There's no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails.
There are some health problems that, when ________ in time, can become bigger.