His father is engineer. He designed such useful machine A．a anB．an
题型：不详难度：来源：
| His father is engineer. He designed such useful machine |
答案
| B |
解析
试题分析：句意：他爸爸是个工程师，他设计了很有用的机器。Engineer 读音以元音开头，用冠词an;useful读音以辅音开头，用冠词a;故选B。做这类题要看单词的读音是以元音还是辅音开头，不能看单词的拼写。 |
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