It is necessary that everyone ______ a copy of this book.

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问题 It is necessary that everyone ______ a copy of this book.

选项 A、has
B、could have
C、will have
D、should have

答案D

解析 在“It is+a.+that从句”结构中,当形容词为important,essential,natural,advisable等词时,that从句中的谓语需要用“(should+)动词原形”。
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