would you please tell me _ a.what to do b.how to do it c.when to do d.how to do

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would you please tell me _ a.what to do b.how to do it c.when to do d.how to do
would you please tell me _ a.what to do b.how to do it c.when to do d.how to do

would you please tell me _ a.what to do b.how to do it c.when to do d.how to do
这一道题除了D 其他的都可以选 得看看上下文是怎么样的.

a和b都是正确的,c.d错误。因为how when 只能做状语,c.d里面的do后面缺宾语。

除了D其它都可以选

选D