.I had been puzzled over the problem for over an hour without any result, _____ all at once thesolution flashed across my mind.
It will be _____ fortnight before he gets _______bachelor’s degree.
---Mike, Guess what? Our team won the basketball game yesterday. ---_________.
The Dragon Boat Festival, which is celebrated _______QuYuan, falls on the fifth day of the fifth lunar month.
_____time goes by, my grandfather’s memory seems to get worse and worse.
Mr. Li lent me a book last week, _____I have learned a lot about earthquakes.