问题
选择题
. I was embarrassed to admit that yesterday I ______ a serious error.
A．acted
B．committed
C．performed
D．completed
答案
答案：C
词义辨析。Acted表演，实行；committed保证；performed进行，执行，做 ，犯；completed完成。句意：我很尴尬的承认昨天我犯了一个严重的错误。所以选C。