名词性从句练习主语从句练习1. _ he made an important speech at the meeting was true. (that; what)2. _well go camping tomorrow depends on the weather. (whether; if)3. _is known to us all is that America is a developed country. (it; what)4. Its known to us all _ water is a form of energy .(that; what)5. It worried her a bit _ her hair was turning gray. (that; what)6. _ makes mistakes must correct them. (who; whoever)7. _ the boy didnt take
