They asked the government to make ______clear to the public ______ they did was right.

The chairman thought __________ necessary to invite Dr. Smith to speak at the meeting.

_______get a good seat, he set out early after supper.

Mr. Zheng is such a __________ person that he has donated much money to the schools in his hometown.

With the help of the computer, information can ____every corner of the world swiftly.