3、andcommunications,italsocauseddeath.A.cutdownB.cutoutC.cutupD.cutoff6. Are you ______ your son has difficulty in studying at school?A.aware of B. aware that C. knowing that D.aware of that7.Baby,Iwillcareandcomfortyou,butIwillnot_______whenyoucanwalkalone.A.holdyouupB.holdyououtC.ho