In just a decade, the company has been ________ from a family business to a large operation.

Since the work is so tiring ，I won’t accept it even if ________ twice as much the money.

He appears to be optimistic, but, ______, he is quite pessimistic

Messages ______ be changed from sound into electricity before they ______ be sent by radio.

China lies ____ the east of Asia and ____ the north ofAustralia.