1) Legs -----------------(use) for walking and running a) are use b) are used c) are useing 2) A lot of people --------------------(injure) in accidents every day a) are injured b) are injureing c) are injure 3) more research into materials --------------------(need) a) are need b) is needed c) are needed 4) modern artificial limbs ----------------------(make) out of plastic a) is make b) are made c) are makeing 5) nowadays , artificial limbs -------------------------(design) to be more controllable a) are design b) is designed c) are designed 6) Gripping-------------------- (make) possible by computer technology. a) is make b) are made c) are makeing

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