A.collaborationB.collisionC.competitionD.competence
A. collaboration
B. collision
C. competition
D. competence
A.issueB.troubleC.thingD.matter
A. issue
B. trouble
C. thing
D. matter
Spammers use software to guess at email addresses.
A. YES
B. NO
【B16】
A. In return
B. And
C. Instead
D. Returning