Many firms give away small quantities of their productions as _______ so that people can try them before buying.

.He is a new comer in the team, but I have the______ that I have seen that man before.

Driven by __________, I asked the interviewee a personal question, which made him quite surprised.

—Americans spend more on health care than most other people .— You’re right . But a new study shows that life      in the United States is falling .

 I think, the Chinese teacher will surely give _____ on your composition.