It suddenly occurred to him ________ he had left his keys in the office.(2012·江西)
Mr.White, who comes from ____ European country, has formed _____habit of attending ____ church on Sundays.
Successful people always make ________ preparations for any potential setbacks.
With a huge amount of food ________,all of the staff are busy preparing for the dinner tonight.
It was ________I went there ________I began to know something about the matter.
________ got on the train when it began to move.