Our knowledge of the universe _____ all the timeA.grow B.is growing C.grows D.grew
问题描述：
Our knowledge of the universe _____ all the timeA.grow B.is growing C.grows D.grew
答
选 B
all the time 的意思一直,全句话的意思是我们的宇宙知识一直在增长.
所以用正在进行时 ： is growing