问题
选择题
The death number in Saturday night’s conflicts between protesters and security forces in Thailand is 19 __________ the number of the injured is 825.
A．before
B．after
C．when
D．while
答案
答案：D
强调对比，用while “周六晚上抗议者与安全局在泰国的冲突，死亡人数为19，然而受伤人数为825。”