As is known to all, earthquakes are ___________ disasters _________ can destroy buildings and kill people.
It’s easier to catch a _____ lion than the one that’s awake.
Mr. Smith didn’t go to the party because he had a lot of experiments _____.
Only if he gets a job ______ have enough money to build his own house.
Harry _______ golf after graduation from college.
---It’s a pity that the trees are going to die.---_____ more attention, they could have grown better.