—When did your cousin begin to show his interest in medicine?—It was a Saturday ___ she noticed her uncle experimenting on a frog in his lab.
There are a number of methods to provide relief from your toothache, which can’t cure the problem.
____ I'm mistaken, I've seen that tall man at a party before.
Paper produced every year is ________ the world’s production of vehicles.
It turned out that she won the first prize in the competition, which was beyond her .
—Hello! This is travel agency office.—Hello! I'd like to book two tickets for Qing Western Tombs.— .