单选题The engineer recommended（）A when we look at this question.B that values his new ideas.C that the process can be made simpler.D which is the Mark 2 project.
题目
单选题
The engineer recommended（）
A
when we look at this question.
B
that values his new ideas.
C
that the process can be made simpler.
D
which is the Mark 2 project.
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参考答案和解析
正确答案：
D
解析：
暂无解析