-Life itself tells us it is necessary to learn to be     .One can hardly survive without help from other people in the world.

Mistakes don’t just happen; they occur for a reason. Find out the reason, and then making the mistake becomes ______.

After having some interesting rides and terrifying free-fall drops, the children returned home, _________ but excited.

From his _______expression, we can guess that the problem maybe was quite _______.

The writing was not _____, so we could not read it at all.