A teacher's________to the cause of education is worth great respect of the whole society because it brings countless benefits to the development of society.
The dark clouds are gathering. You’d better take your umbrella _______ it rains.
At the gate _______ two stone lions.
It’s hard for a woman to run after fashion as it _______ so quickly.
The twin brothers are very similar ______ appearance but quite different _____ hobbies.
Children experts suggest children ______ more time to play freely.