A million years ______ but a brief span in the history of our planet.A、have been

游客2024-09-28 19

问题 A million years ______ but a brief span in the history of our planet.

选项 A、have been
B、are
C、is
D、has been

答案 C

解析此题考查主谓数的一致。a million years作为一段时间，为单念，因此其谓语应为单数is。

转载请注明原文地址:https://tihaiku.com/zcyy/3777679.html

相关试题推荐

随机试题

最新回复(0)

TheHistoryoftheAtomicBombOnAugust2