eeply absorbed in work, ________ heoften was, he would forget all about eating or sleeping.

The article written by the famous economist is really _______. None of us can understand it.

________ they heard the shout for help，they rushed out

Soon after the quakes，one thousand soldiers were sent out to the miners from the local coal mine.

When did you meet Jack for the first time—I met him________the airport________National Day．