单选题
Dr. Bruce will first give you a summary of the situation and then discuss it ______.
A. at interval
B. at random
C. at issue
D. at length
【正确答案】
D
【答案解析】[分析] at length“详细地”,“最后”,如:speak at(great)length;at intervals“不时”,“相隔一定的距离”;at random“胡乱地”,“随便地”;at(in)issue“在争论中”,“不和的”。如:be at issue with sb.因此,只有D符合题意。