We were all there when the accident {{U}}occurred{{/U}}.

题库:综合类 类型:最佳选择题 时间:2017-07-03 03:15:22 免费下载:《单选题》Word试卷

We were all there when the accident {{U}}occurred{{/U}}.
A.happened
B.broke
C.spread
D.appeared

本题关键词:ALL-L1型,ALL-L1型白血病;