Once new difficulties _____ in our study, we should learn to use our brains to solve them.
Australia is one of the few countries ________ people drive on the left.
Three of the town's factories have closed down ________ the space of a year.
The old couple used to live deep in the countryside, without easy ________ to shops.
It is ________ challenge for graduates to get ________ job as unemployment is high nowadays.
—I'm sorry I've spilt some tea on the tablecloth. —________;it will wash out.