Unlickily there many thousands of children w____ can not go to school.

问题描述:

Unlickily there many thousands of children w____ can not go to school.

Unlickily there are many thousands of children who____ can not go to school.

添who就行了

Unlickily there (are) many thousands of children (who) can not go to school.
很不幸,有许许多多上不起学的孩子.
这里应该是填定语从句的引导词who,指代先行词children.