Three－fourths of the surface of the earth _____ sea. A: isB: have beenC: areD: was
Three－fourths of the surface of the earth _____ sea.
A: is
B: have been
C: are
D: was
相关考题：
Application of the transformational rules yields__________ structure.A．lexiconB．deepC．mexicalD．surface
是Surface的抽象接口，操纵surface的控制器。