基于EPC的NSA组网，本版本支持下列哪些网络架构？
A. option3
B. option4
C. option7
D. option2
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一个复杂的英语句子中，我们可以通过 来快速锁定里面的分句。
A. 主谓结构
B. 引导词如which，that， when， even though等
C. 引导词和主谓结构
这个句子中共有几个分句（主句+从句）？While （I was） quietly minding my own business in a bathroom at school recently, I overheard two of my students who didn’t know, or perhaps didn’t care, that I was there.
A. 3个
B. 4个
C. 5个
以下哪个句子翻译是正确的？我读着老师推荐的小说，已经在咖啡馆待了两个小时了。
A. I have stayed in the coffee house for 2 hours, reading the novel introduced by the teacher.
B. I have stayed in the coffee house for 2 hours, read the novel introduced by the teacher.
C. I have stayed in the coffee house for 2 hours, reading the novel introducing by the teacher.
D. I have stayed in the coffee house for 2 hours, read the novel introducing by the teacher.
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