quEstions 9 AnD 10 ArE BAsED on thE Following nEws. ACCorDing to thE nEws itEm, thE potEntiAl trEAtmEnt For slEEping siCknEssA.wAs iDEntiFiED ByBritish ExpErts. B、hAs BEEn put into sErviCE For 18 months. C.hAs not Fully BEEn DEvElopED so FAr. D.is tAkEn By injECtion.