The young couple are always quarreling ____ family affairs, so it’s only a matter ____ time before they get divorced

Cross the road carefully, _________ you’llkeep yourself safe.

I work in a key middle school the teaching quality is a major concern.

he is very poor, he feels very happy.

15．– How cold it is! I wonder how grass survive under such heavy snow． –Don’t worry．There is a lot of air in loose snow which _______．