43.Obama's success in presidential election proves that the color of one’s skin shouldn’t be a _____ to success.

A.barrier B.behavior C.battle D.bunch

44.Where is the plane?I can't see it.

It went off its _____ to keep away from the sudden storm.

A.road B.course C.flight D.direction

43.答案是A,

奥巴马总统竞选的成功证明肤色不应该成为成功的障碍，barrier,障碍，根据句意选A。

44.答案是B，

句意:飞机在哪里？我看不到了，为了避开突如其来的暴雨，它改变了航线。Course 船只或飞行器的航行，航线。