问题

Liu Xiang was injured in the first round and had to _____of the 2008 Beijing Olympic Games. [ ]

A: drop off
B: drop back
C: drop by
D: drop out

正确答案是：

同类题型

―How are things going? ―The disabled _______ no relatives in Guangzhou _______ by the volunteers, who will graduate from Zhongshan University next year

_ him not to go abroad, but hewouldn’t listen

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Our teacher told us _______________ carefully in class.