_________ , Shirley thought Carol’s husband was ill, but later she realized he w

游客2023-11-11  20

问题 _________ , Shirley thought Carol’s husband was ill, but later she realized he wasn’t.

选项 A、First
B、At first
C、Firstly
D、First of all

答案 B

解析 介词词组“ATFIRST”做状语,意思是“起初,原先”。
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