You have to be patient if you want to sustain your position.A.maintainB.est

问题补充：

1.[单选题]You have to be patient if you want to sustain your position.A.maintain B.establish C.acquire D.supportABCD

答案：

参考答案：A

参考解析：本题考查动词。题干：如果你想保住位子就得耐心。sustain可以用maintain来替代。