—When will you come to see me,Dad?—I will go to see you when you___the training course
________ 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.