Due to the volcano eruptions in the Republic of Iceland, all the flights are delayed or cancelled, so the conference has to be ________.
---_____ the letter on your way to office. ---OK. I _______.
From the situation in this financial crisis,you can see _____China is totally not ______ she used to be a century ago.
The manager ________ excited when he learnt the project ________ well.
It was in the lab, ________ was taken charge of by Professor Curie, _______ they did the experiment.
The answer ________ the teacher,she asked the little boy to try a second time.