题目内容：
By whom was the letter sent?参考答案：
选择题：By whom was the letter sent?
- 题目分类：国家开放大学-开放英语4
- 题目类型：选择题
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With whom did you go to the meeting?
With whom did you go to the meeting?
They work as a group - no one person is allowed to
They work as a group - no one person is allowed to d _______. (支配地位).
It is now two months (1)___
It is now two months (1)___ the new computer system was installed. Although many
The training was too long. It needed___
The training was too long. It needed___
亚马逊通过设立网上书店作为其主要销售业务站点，同时创立世界著名的网站品牌，因此，它属于混合型网络营销
亚马逊通过设立网上书店作为其主要销售业务站点，同时创立世界著名的网站品牌，因此，它属于混合型网络营销。（ ）选择一项：对错