Instead of _____ their burden, he gave the students more homework. Do you think it right?

A.increasing

B.bearing

C.adding to

D.lightening

答案及解析： D

词义辨析。   increasing增加；bearing承受，支撑 ； adding to  加入； lightening 使……轻松。句意：不减轻他们的负担，他反而给了学生更多的作业，你认为对吗？故选D。