几道高中英语单选,
1.Somepeoplehaven'trealisedsthaocommonas_____tothesunforalongtimewilldoharmtotheirskinandevencauseskincancer.
A.exposingB.exposedC.havingexposedD.beingexposed
2.Itissadtoseetheoldmuseumbeing_____tomakewayforanewshoppingcenter.
A.takeninB.takendownC.takenupD.takenout
3.-Wherehaveyoubeenallday?
-I____myoldfriendandwehavebeentalkinguntiljustnow.
A.metB.havemetC.havebeenmeetingD.hadmet
4.Thepastdecade___greatchangesinmyhometown,whereyoucanseemanynewbuildings___hereandthere.
A.witnessed;wassprungupB.haswitnessed;havebeensprungup
C.haswitnessed;havesprungupD.witnessed;sprungup