三大从句1.Sarah Brightman, _ will fly to space in 2015, is the first woman to fly there in the field of music.A.who B.that C.which D.whose2.Air pollution is getting more and more serious, so we must take action _ it is too late.A.before B.after C.until D.when3.Ram explained to his mother _ he would get home late that night because of extra work.A.that B.which C.what D.whether4.I think you should work harder _ you are satisfied with the way thin
