单项选择。This is ______ "s" and that's______ "u". [ ]A. a, a B. a, an C. an, a

题目简介

单项选择。This is ______ "s" and that's______ "u". [ ]A. a, a B. a, an C. an, a

题目详情

单项选择。
This is ______ "s" and that's______ "u".
[     ]
A. a, a
B. a, an
C. an, a
D. an, an
题型:单选题难度:偏易来源:同步题

答案

C

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