We expected 50 people to take part, but the number was a lot higher.
A. average
B. correct
C. usual
D. actual
网友回答
A. average
B. correct
C. usual
(答案→)D. actual
解析：句意:我们预计有50人参加, 但实际数量要高得多。average平均的；普通的；correct正确的；恰当的；usual通常的;惯常的；actual实际的；真实的。根据题意，只有D项正确。