It is desirable that water used for drinking（） pure．选项 -题库考试答案搜索网

It is desirable that water used for drinking（） pure．选项

单选题

2021-09-02 12:00

A、 were
B、 should be
C、 is
D、 ought to be

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正确答案

B

试题解析

标签：综合英语

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