21.   This is a major upgrade.

22.   TWA is planning a major upgrade on its service to San Juan.

23.   Unless you want to do a major upgrade on a relatively obsolete machine, avoid the headache.

24.   Perry and McLachlan on Friday announced two major upgrades in cooperative military maneuvers.

25.   Programmers already are mapping out a major upgrade to the program, but that will take at least two years to develop, he said.

26.   Perry and McLachlan confirmed three major upgrades in security and military cooperation.

27.   A major upgrade of the plant was underway and would lead to the commissioning of a new odour control system by November, Cook said.

28.   But so has quarterback, where Jim Harbaugh and Erik Kramer are a major upgrade from Ryan Leaf and Craig Whelihan.

29.   China has been keen to deploy its own stealth warships to counter the acquisition by rival Taiwan of missile frigates purchased from France in a major naval upgrade.

30.   I do agree that our current education system needs a major upgrade to keep up with time.