2646924 Tom knows the system. CK 1 2276025 I don't have a system. CK 1 2285819 Don't mess up my system. CK 1 305809 They changed the system. mamat 1 2402223 You don't know the system. CK 1 1026882 Tom came up with a new system. CK 1 65602 We have a good heating system. CK 1 1950647 I can't afford an alarm system. CK 1 3221354 This is a really stupid system. CK 1 1094149 Tom explained the system to Mary. CK 1 2288147 You don't know the system, do you? CK 1 903686 There is an urgent need for a new system. CK 1 22212 Neptune is the eighth planet of the solar system. CK 1 1300205 Our dorm's heating system isn't working properly. CK 1 1093674 Tom has developed a new system for learning English. CK 1 1093660 Tom has just installed an alarm system in his house. CK 1 275719 The majority of big banks are introducing this system. CM 1 903713 There is an urgent need for them to update their system. CK 1 953634 I think it wouldn't be too hard to come up with a better system. CK 1 239872 The ancient Greeks knew as much about the solar system as we do. CK 1 953858 I'm sure it wouldn't be too hard to find out who hacked into our system. CK 1 51654 All systems are go. CM 2951357 The old system works. AlanF_US 1632235 The old system works. Spamster 1669872 The system is rotten. Spamster 806840 The system worked well. Source_VOA 2957030 Tom is a systems engineer. CK 2375930 I know how the system works. CK 1972115 It's a very dangerous system. Guybrush88 735921 Let me check the system here. cruzedu73 57954 This heating system burns oil. CK 954267 Show me your new filing system. CK 945663 No security system is foolproof. darinmex 61050 This system has obvious defects. Zifre 306475 They did away with the old system. CK 50340 The system is working very well now. CK 1094159 Tom explained how the system worked. CK 693381 If all else fails, reboot the system. darinmex 3006096 It's time for us to change the system. CK 906963 What's your favorite operating system? CK 1400697 GPS means "Global Positionning System". alexmarcelo 802416 They lost faith in the existing system. Source_VOA 704441 They're here to fix the heating system. Zifre 19106 The educational system is in transition. CK 807400 This system worked well until the 1840s. Source_VOA 1336544 It's incredibly easy to cheat the system. Scott 669947 None of us were satisfied with the system. Zifre 1725541 The lubrication system was poorly designed. belgavox 2538173 Tom needs a new exhaust system for his car. CK 2953808 We want to know who hacked into our system. CK