There is a rumor which a large factory is going to be built in your hometown.的单句改错

将which改成that.
因为先行词是rumor,它后面的从句的等同于这个单词的意思（谣言）,
这是个同位语从句.
rumor:
名词 n.
1.谣言,谣传;传闻,传说[U][C][(+of/about)][+that]
Rumor has it that the defence minister will soon resign.
据传闻,国防部长不久就要辞职.
2.咕哝,喃喃低语
要注意：1,可以跟同位语从句的名词通常有news,idea,fact,promise,question,doubt,thought,hope,message,suggestion,words（消息）,possibility等.
I’ve come from Mr wang with a message that he won’t be able to see you this afternoon． 我从王先生那里来,他让我告诉你他今天下午不能来看你了.
2,英语中引导同位语从句的词通有连词 that,whether,连接副词 how,when,where等.（注：if,which 不能引导同位语从句.）