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。
