What do you suggest________more suitable?
As is known to all language learners, the newly learnt words will soon be forgotten unless ______ used in everyday communication.
Young adults ______ older ones are more likely to prefer sports and become enthusiastic sports fans.
If you still remember the ______ time of the accident, please tell us. We would ______ your help.
It is reported that a bus went out of ______ control on a highway ______ south of the city last night.
The boys are doing no harm; they are ___ playing.