Mark was a student at this university from 1999 to 2003, __________ he studied very hard and was made Chairman of the Students’ Union.
________ time went by, small clever animals covered the earth and have become the most important animals on the planet.
________ at the result, the boss left without saying any word.
It was quite a job for her to ____ several children all by herself during the war.
He looked around and caught a man _______ his hand into the pocket of a passenger.
It’s always difficult being in a foreign country, ________ if you don’t speak the language.