It’s high time we our attention to this problem.
In that school, English is compulsory for all students, but French and Russian are __________
The doctor __________ that the little boy should often be taken out for fun.
When I graduate from this famous university, I'll __________ what I have learned to everyday life.
—I heard you went to Hainan the other day. —So I did. That was the third time that I __________ there.
A notice was placed by the river bank warning people to__________ the thin ice.