问题
选择题
(2013·江西九江二模)If you won't do as I tell you, you ________ get the chance to be promoted because the competition is just too fierce.
A．couldn't
B．mustn't
C．shouldn't
D．shan't
答案
答案：D
选D 考查情态动词。句意：如果你不照我说的做，你就得不到晋升的机会，因为竞争太激烈了。shall用于第二、三人称可表示说话人给对方的警告，符合句意。