*!~~q1) this is (how/because/why/that) the machine works.
답은 how인데요 나머지것들은 의미상어색하거나 문법적으로 틀려서 그런가요?(문법적으로 틀리다면
어떻게 틀린건가요?)
q2) he often thinks of (what,how,that,which) he can do more for hiscountry.
답은 how인데요 how he can do 밑줄친 do가 타동사이므로 what(선행사포함해서요)이오는것도 될듯한데요 왜
what,which,that은 답이안되는지요?