英语句子结构问题,请大家回答.
Through internet people all around the world can communicate with each other just by knocking the keys slightly,which is out of our imagination in the past.
释义：通过互联网全世界的人紧紧靠轻敲键盘就能彼此交流,这在过去是出乎想象的.
请问,which后面那个从句用对了吗?
“is ”改为“was”