Henry can’t attend the party _____ at Tom’s house at present because he is preparing the speech at the party _____ at Marie’s house tomorrow.
In science fiction we read of flying saucers travel through _____ space, so people want to have ______ better knowledge of the universe.
In order to find _______ better job, he decided to study _________ second foreign language.
The biggest whale is ___ blue whale, which grows to be about 29 meters long—the height of ___ 9-story building.
We can never expect____bluer sky unless we create____less polluted world.
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.