If you have a job,       yourself to it and you’ll succeed.
A．don’t devoteB．do devoteC．devotingD．not devote
B
考查時態(tài)。后面是一個句子，故排除C、D；根據(jù)意思，應用肯定句。這是個祈使句，do表示強調(diào)。
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