Sam,you don' work hard at geography

问题描述:

Sam,you don' work hard at geography
My dad says that the world is changing evey day,____Idecide to wait until it stops
A.becauseB.while
C.ifD.so
是选D吗, 所以我选择等待知道地球停止改变 .是转折吗?

yes,但是因果