[ ] he told us about how to learn English well is very important for us all.

问题描述:

[ ] he told us about how to learn English well is very important for us all.
A;Where
B;What
C;That
D;Which
必须有理由

B
he told us about how to learn English well
从结构上看,tell sb.sth.about sth.
缺宾语,只有what能用