英语高手帮我看看下列句子属于什么从句
说说是什么从句,且引导词作什么语1.That we need money is qute clear 2.Whether the car can be used has not been known yet.3.They expressed the hope that they would come over to China again.4.Word came that his poem won the first prize.5That the earth is round is true.6.Who will be sent there hasn't been decided.7.It is certain that he will come 8.Do you know what he said just now.