题干
The boy is from England, so he speaks English well.
A：hears from
B：borrow……from
C：comes from
答案(点此获取答案解析）
C
The boy is from England, so he speaks English well.
A：hears from
B：borrow……from
C：comes from
的首项为3，
为等差数列且
，若
，则
＝ （ ）
