2. 外语
  3. It is known that mathematics______the language of science.

It is known that mathematics______the language of science.

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问题 It is known that mathematics______the language of science.
选项 A、are
B、are going to be
C、is going to be
D、is
答案D
解析 主谓一致。Mathematics，physics，politics，acoustics，statistics，economics等以-s结尾，表示学科的名词，都是单数形式，谓语动词使用单数。
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