—He was early drowned in a pool.—Oh, when was ______ exactly?— It was in 1983 _______ he was swimming with his friends.
________ seems to be no possibility _______ the shy girl can win the first prize in the contest.
It took a long time for the effective use of natural gas ______.
Although the couple didn’t choose to sleep in the wild instead of in the hotel, it_______ unexpectedly beautiful.
---He suggests the number of cars should be limited to stop air pollution. --- __________, the idea is not very practical.
Scientists are trying to develop a special material, _______ they will make use of in space.