Ifhekeepsonworkingsohard,he’ll

來源：國語幫 2.39W

If he keeps on working so hard, he’ll ______ under the pressure of work.

k down g down k out k into

A break down出故障，(健康狀況)變得惡劣；bring down*，打垮，擊敗；break out爆發，發生；break into強行闖入。故選A。