单选题：The additional 2 billion dollars will mainly be used to[A] u

题目分类：专四
题目类型：单选题
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题目内容：

The additional 2 billion dollars will mainly be used to
[A] upgrade its network capacity.
[B] improve customer services.
[C] develop new products.
[D] market more iPhones.

参考答案：

答案解析：

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