If you work hard like this,you will break down-----

选A.If you work hard like this,you will break down in no time.
如果你工作这样拼命,你很快就会垮掉.
in no time:不要用多少时间,很快,立刻
on time:准时,按时.
in time:及时,恰好.
for the time being:这段时间
所以只有A符合句子原意.