完成句子（共20空，每空0.5分，满分10分）
妈妈和爸爸外出度假，比预期的时间提前一天返回家中。
Mom and Dad arrive back from vacation a day earlier _________ ___________.
很多青少年感到孤独，好像没有人理解他们以及他们正在经历的变化。
Many teenagers feel lonely, as if no one understands them and the changes they are __________ __________.
你最好带上钥匙以防我不在家。
You’d better take the keys __________ __________ I’m out.
老板必须被告知工作的进展情况。
Nobody knows when the project will be completed. The boss has to be kept __________ ____________ the progress of the work.
羊毛市场从先前的衰退中恢复过来。
The wool market has __________ ___________ its earlier weakness.
女性组成英国五分之二的劳动力。
Women __________ _________ two-fifths of the British labour force.
希腊的经济从长远看会变好的。
The economy of Greece will run better __________ _________ __________ __________.
.我，也就是你们的英语老师，有很多朋友，其中大部分是外国人。
I, who ________ your English teacher, have a lot of friends,________ ________ _________ are foreigners.