用某事威胁某人
A. hurt sb. back
B. take one's part
C. hold sth. over sb.
D. keep sth. from happening
Sending out Thanksgiving cards could let the volunteers know that people are ______ to them. (financial, grateful, effective)
The volunteers working in the library seemed to appreciate the staff's silent way to ______ them. (recognize, post, repair)
I'll phone you in my lunch ______ about the company's potluck dinner for the volunteers. (appetite, award, break)