41While she was ice-skating, Eva ......B......... on theicy surface and broke her leg.B slipped 42If Mary is too busy to help Paul and Linda move house, they'll do it B themselves 43This is the beach ............. my brother works as alifeguard.A where 44As I was looking through some old photos, I came ...... a picture of my grandfather in his army uniform.C across45Tom's laptop ........... him to go online and do hiswork even when he's not in the office.C enables46Larry is a very good athlete. He runs.......... thananyone else on the school team.A more quickly 47Juan loves listening to English pop songs, even though he doesn't understand all the ....... B lyrics 48If we don't reduce air pollution, acid rain willcontinue to ............. the trees and plants we needfor oxygen.A burn 49............... Maria got to work yesterday, she checkedall her emails.A As soon as