He is afraid to face the difficulty he thinks he’ll have the driving test tomorrow; he finds it difficult rid of the worries.
Tom as well as two of his friends ________ to the concert last night.
—I am afraid I can’t finish the book within this week. —________.
—It can’t be too worse. —Just _______. Things will turn out to be better so long as you don’t stop trying.
The villagers have already known _________ we’ll do is to rebuild the bridge.
The development of industry has been ________ gradual process throughout ________ human existence, from stone tools to modern technology.