题目内容
【题目】There __________ great changes in the smart mobile phones in the last few years.
A. was B. have been
C. has been D. were
【答案】B
【解析】
试题分析：句意：在过去的几年里智能手机有了巨大的变化。根据in the last few years.可知该用现在完成时，所以选B.
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题目内容
【题目】There __________ great changes in the smart mobile phones in the last few years.
A. was B. have been
C. has been D. were
【答案】B
【解析】
试题分析：句意：在过去的几年里智能手机有了巨大的变化。根据in the last few years.可知该用现在完成时，所以选B.