This is the reason ______ an airplane can fly in the sky.A、whyB、whichC、for tha

游客2025-07-11 1

问题 This is the reason ______ an airplane can fly in the sky.

选项 A、why
B、which
C、for that

答案 A

解析 reason 后的从句应由why 引出(它是reason 的同位语从句)。这是固定用法，不能由其他词引导。

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