英語語法中定語從句

1 定語從句缺少先行詞，This factory is ___ the foreign visitors visited... 同時先行詞在定語從句中做visited的賓語（關系詞可省略），填the one.
2 定語從句有先行詞the factory了，只缺少關系代詞，在從句中做visited的賓語，填which和that均可。
3 The factory is ____ you visited... 缺少先行詞，定語從句卻賓語，填the one.
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The day he has looked forward to _____at last.
請注意he has looked forward to是定語從句，先行詞是the day，在定語從句中做賓語(關系詞被省略)，即
（他盼望的）那天，來了。
The day (that he has looked forward to) came at last.句子的主干是The day came at last.
懂了嗎？

1.正常語序應該是This factory is the one (that) the foreign visitors visited last week. the one 做的是主句的表語，從句的賓語
2.正常語序為This is the factory that/which you once visited. that 和which 做的是visited的賓語，這題B和D應該是都對的
3。正常語序為The factory is the one(that)you once visited.原因同第一題