--I'm going downtown.--Come on.
______ it is true that a student’s most important goal is to do well in his or her studies, it doesn’t need to be the only goal.
He devoted most of his time to his research, believing his hard work would___sooner or later.
China, a country with 145 million elderly people, will remain _______ ageing society during this century, according to _______ Chinese population experts.
— Shall we walk around the park or go for a bike ride?— _________. They are both good activities to me .
John plays football __________, if not better than, David.