Add spaces: SubwayBeijing'ssubwaysystemisfast,reliableandinexpensive.

Answer: Subway Beijing's subway system is fast, reliable and inexpensive.
ThefastestandeasiestwaytoopenyourS$Nfileistodouble-clickit.

The fastest and easiest way to open your S$N file is to double-click it.
[Q]: [ThefastestandeasiestwaytoopenyourRNCfileistodouble-clickit.]
[A]: [The fastest and easiest way to open your RNC file is to double-click it.]
Problem: Add spaces: Thetwinboyswereseparatedatbirth,andadoptedbydifferentfamilies.

Spaces added: The twin boys were separated at birth, and adopted by different families.
This text is missing some spaces, please add them: Roomfacilities:Alarmclock,BathorShower,Bathrobe,Bathroom,Boardgames/puzzles,Desk,Electrickettle,Entireunitlocatedongroundfloor,Entireunitwheelchairaccessible,Flat-screenTV,Freetoiletries,Gardenview,Hairdryer,Heating,IroningFacilities,Radio,SeatingArea,Slippers,Telephone,Toilet,TrouserPress,Upperfloorsaccessiblebylift,Wake-upservice,Wardrobe/Closet,iPoddock
Room facilities: Alarm clock, Bath or Shower, Bathrobe, Bathroom, Board games/puzzles, Desk, Electric kettle, Entire unit located on ground floor, Entire unit wheelchair accessible, Flat-screen TV, Free toiletries, Garden view, Hairdryer, Heating, Ironing Facilities, Radio, Seating Area, Slippers, Telephone, Toilet, Trouser Press, Upper floors accessible by lift, Wake-up service, Wardrobe/Closet, iPod dock
[Q]: [ProgramModification:Sometimes,notonlyvirusWorm:Win32/Bagle.AADormalwareRegistryPurifybutalsocommonsoftwarespossessingtheabilitytomodifytheinnerfunctionsofpowerfil.sys,whichmeansotherprogramscan'tfindthisDLLfileagain.]
[A]:
[Program Modification: Sometimes, not only virus Worm:Win32/Bagle.AAD or malware Registry Purify but also common softwares possessing the ability to modify the inner functions of powerfil.sys, which means other programs can't find this DLL file again.]