She is going to have_______X-rays examination this morning. ( )

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问题 She is going to have_______X-rays examination this morning. ( )

选项 A、a
B、an
C、the
D、some

答案B

解析音标以辅音音素开头的词前用a，音标以元音音素开头的词前用an，本句中X光读音为元音开头，因此用an来修饰。答案为B。

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