(含答案)
本单元重点词汇讲解：
1. … and hens are thought to ensure good luck for the marriage. (p34)
ensure (ensured, ensured, ensuring)
① 保证；担保 [+that][+v-ing]: To make sure or certain; insure
ensure success [safety, supplies] 保证成功[安全，供应]
1) I can't ensure his being on time. 我不能保证他的准时。
2) I can't ensure that he will be there on time. 我不能担保他会及时到那儿。
3) This medicine will ensure you a good night's sleep. 这药将保证你一晚睡眠良好。
② 使安全，保护 [(+from/against)]
These are safety devices to ensure workers against accidents.
这些安全设施是为了保护工人不出事故。
2. … And everyone congratulated t he new couple because it was considered very lucky. (p34)
① 祝贺；恭喜 [(+on/upon)]
1) I congratulate you on your great discovery.
我祝贺你的伟大发现。
2) I want to congratulate you with all my heart.
我衷心地祝贺你。
② (后接oneself)自我庆幸 [(+on)]
He congratulated himself on having survived the air-crash.
他庆幸自己在空难中幸免于死。