我想问一道英语题is this research center______you visited the modern equipment last year?

我想问一道英语题is this research center______you visited the modern equipment last year?
我想问一道英语题
is this research center______you visited the modern equipment last year?

我想问一道英语题is this research center______you visited the modern equipment last year?
where或者at which,改成陈述句就是
this research center is __where____you visited the modern equipment last year.
如果填which 的话,应该是这样的
is this the research center______you visited last year?
变成陈述句如下
this is the research center--that或者which-- you visited last year.

1 where
2 at which
两者都可以

which

填入关系副词 where
解析：
1. 该题很明显含有一个定语从句，具体分析如下：
主句 ——Is this research center
从句 ——______ you visited the modern equipment last year?
2. 从句是主谓宾结构：

主语...

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填入关系副词 where
解析：
1. 该题很明显含有一个定语从句，具体分析如下：
主句 ——Is this research center
从句 ——______ you visited the modern equipment last year?
2. 从句是主谓宾结构：

主语 —— you
谓语动词 —— viisted
宾语 —— the modern equipment
3. 由 2 可知，从句中主语和宾语齐全 ，而关系代词只能在句中充当主语或宾语，因此不能选择关系代词；如果选用关系副词，成为 where you visited the modern equipment，，相当于 you visited the modern equipment in the research center，即 where 指代 in the research center，那么，where 就是从句的地点状语。

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我是来看楼上的

各位，别争了。我们把原句改成陈述句就能发现问题了（不影响选择，反而会让我们看得更清楚）This research center is ______ you visited the modern equipment last year.这样很清楚可以看出，不论填which 还是where 都不对，因为空格前面根本就没有先行词！！原句很可能是漏掉了一个定冠词the,句子应该是Is this the r...

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各位，别争了。我们把原句改成陈述句就能发现问题了（不影响选择，反而会让我们看得更清楚）This research center is ______ you visited the modern equipment last year.这样很清楚可以看出，不论填which 还是where 都不对，因为空格前面根本就没有先行词！！原句很可能是漏掉了一个定冠词the,句子应该是Is this the research center_____ you visited the modern equipment last year?, 这样的话张达人的选择和解释就是很到位的。如果原句没有错，我们只能填the one where。变成Is this research center the one where you visited the modern equipment last year?这样，由where 引导的定语从句修饰the one这个先行词，就对了。

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that
定语从句中 连接词不确定填什么的时候 就填that