B did
这是虚拟语气,neccessary后面的从句,should do ,或过去式.我只知道后面跟should do。还有过去式吗？它们的意思一样吗？通常是用：should do应该。。。。但后面还有个if he wishes to be healthy。wish 后面也常常是事与愿违的虚拟情况，用过去时的居多。这里面有一种表示与事实相反的意思。很多人并不会去锻炼，有一种痛心疾首的意思在内。.
It is neccessary that a person()exercise eveyday if he wishes to be healthy.Adoes Bdid Cdo Dtakes
It is neccessary that a person()exercise eveyday if he wishes to be healthy.Adoes Bdid Cdo Dtakes
答案是B为什么呢
答案是B为什么呢
英语人气：389 ℃时间：2020-05-25 16:01:17
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