1、  bust－break（Come out, or I’ll bust the door down.）

2、  wary—cautious（The police will need to keep a wary eye on this area of town.）

3、  rigid—inflexible（The rules are too rigid to allow for human error.）

4、  incredible—unbelievable（It seemed incredible that he had been there a week already.）

5、  migrate—travel（These animals migrate south annually in search of food.）

6、  circulate—spread（Rumers began to circulate about his financial problems.）

7、  came across—found by chance（She came across three children sleeping under a bridge.）

8、  as regards—about（I have little information as regards her fitness for the post.）

9、  manipulate—influence（As a politician, he knows how to manipulate public opinion.）

10、 tempted—attracted（He was tempted by the high salary offered by the company.）

11、digest—understand（He paused, waiting for her to digest the information.）

12、anchored—fixed（Make sure the table is securely anchored.）

13、aggressive—offensive（She gets aggressive when she is drunk.）

14、peculiar—strange（There was something peculiar in the way he smiles.）

15、expire—end（The contract between the two companies will expire soon.）

答案：dbbac aacdb dbcdb