问题补充：
. The concert by Lang Lang was so well that all the tickets had been on the first three days last month.
A. received; sold out
B. recognized; sold out
C. admitted; selling out
D. taken; selling out
答案：
(答案→)A. received; sold out
B. recognized; sold out
C. admitted; selling out
D. taken; selling out
解析：考查词义辨析及时态。received 接受，recognized 认出，admitted 承认，taken 带走，句意：由朗朗举行的音乐会如此广泛的被接受以至于在上个月的前三天票就已经卖完了。根据语境是票已经被卖完，应用被动语态，所以选A。
