必修五 Module 1
阅读理解提速练——练速度
(限时：20分钟)
A
(2016·哈尔滨市第三中学一模)Babies don't learn to talk just from hearing sounds. They are lipreaders too. It happens during the stage when a baby's babbling (咿呀声) gradually changes from unclear voices into that first “mama” or “dada”. The baby in order to do like you has to figure out how to shape their lips to make that particular sound they are hearing, according to developmental psychologist David Lewkowicz of Florida Atlantic University, who led the study.
