as a strict but good captain,_________ who, usually, took care of the sailors on his ship.

It is ___________ that this matter hasn’t been paid attention to.

The man insisted that he _______ the old lady’s money and _______ at once.

Work harder, _______ you will get more grades in the coming exam.

Among the 15-year-old children, some ____ studying in university while others are still learning to read and write.