It’s certainly been a long time _________ we met last time

Young people who have got jobs may realize university lessons can’t be the only preparation for all of the situations____appear in the working world.

Human beings are different from animals _________ they have languages.

How kind you are!You always do what you can______me.

In 1969, Neil Armstrong, an American astronaut, _____ the moon for the first time, which announced man began to march at the universe. [ ]