... Unit 4 : Special education Period 28: Speaking Sign language: ng«n ng÷ cö chØ Walking stick: gËy chèngHearing aids: thiÕt bÞ trî thÝnh Unit 4: Special ... they must have difficulty hearing and speaking. However, many can use hearing aids to help them with hearing.A: how can they overcome their problem of speaking? B: They can use sign language ... 1, hearing aids 2, difficulty hearing and speaking 3, hear and speak 4, sign language and gestures that are used to communicate instead of spoken language,...