My cousin,along with his classmates,空happy with the school activities,

问题描述:

My cousin,along with his classmates,空happy with the school activities,
空they can improve their English a lot.
A is ,where.Bare,which.Cis that.Dare when

A谓语与前面的主语单复数一致,along with是附属的,所以用is后半句相当于in the school actviities----- they can improve their English a lot .用where 代替in the school actiivities这一地点状语,where= in which...