Do you _________ or serve in an organization or are you a member of some group?
#12567
A
simplify
B
require
C
sign
D
volunteer
推荐题目
—How did she get infected?  —She _______ the viruses without any protection.
#12814
A
exposed to
B
had exposed to
C
was exposed to
D
been exposed to
Kate is only a nodding ______, not very familiar to me. 
#12847
A
acquaintance
B
partner
C
companion
D
coincidence