2. 外语
  3. The number of cell phones ______ increased dramatically in the past few years.

The number of cell phones ______ increased dramatically in the past few years.

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问题 The number of cell phones ______ increased dramatically in the past few years.
选项 A、have
B、are
C、has
D、is
答案C
解析 the number of意为“……的数量”，谓语动词用单数．例如：The number of books stolen from the library is large．(图书馆遗失的书很多。)而a number of意为“很多，计多”，它修饰的复数名词作主语时，谓语动词用复数，例如：A large number of people have applied.(很多人都已申请。)
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