The great Pyramid is about 137meters high todays,but it was--once A higher B highest C high too

问题描述:

The great Pyramid is about 137meters high todays,but it was--once A higher B highest C high too
D mor high,选什么,为什么呢

A
题意:大金字塔今天大概137米高,但是它曾经(once)更高.
用形容词的比较级,high(单音节词)的比较级为higher,选A