Since he was busy, so he didn't come.（）

题库:邮政储汇业务员考试 类型:最佳选择题 时间:2017-06-30 14:52:57 免费下载:《单项选择》Word试卷

Since he was busy, so he didn't come.（）
A.Since
B.was
C.so
D.didn't

本题关键词:HE染色切片,肠内营养乳剂(TP-HE),瑞高(肠内营养乳剂 (TP-HE));