一、用合适的介词填空
1．Three of the town's factories have closed down ________ the space of a year.
答案与解析 within 句意：这个镇里的工厂有三家在一年的时间内就倒闭了。within“在(某段时间)之内”，后加一段时间，符合句意。
2．We often hear children sing songs happily in the kindergarten ________ the street.
答案与解析 across 句意：我们经常可以听到街道另一边幼儿园的小朋友在快乐地唱歌。across表示从某物的表面“横过”。
3．—How smart you are in that suit!
—Can't you see I'm thinner? I've managed to lose my weight ________ 10 pounds.
答案与解析 by 由句中的“Can't you see I'm thinner？”可知，答话人和以前相比瘦了，因此填by。by＋数量词表示升降、增减的程度。
4．Like golf, yoga is a recent arrival ________ China, and could be on its way to becoming a booming business.
答案与解析 to 句意：和高尔夫一样，瑜伽也是近年才出现在中国，它可能会成为一个蓬勃发展的行业。这里用介词to表示“对……来说”。
