用正确的关系代词填空。

I will never forget the day ________ I met her for the first time．

用正确的关系代词填空。

Who will help them ________ are in trouble now?

用正确的关系代词填空。

I think I can understand all of those ________ you did．

用正确的关系代词填空。

You must take messages to those ________ are not at the meeting today．

用正确的关系代词填空。

He comes from Nanjing ________ was the capital for six dynasties at the history．

用正确的关系代词填空。

How do you get the idea ________ is considered the best one among all the ideas?

用正确的关系代词填空。

The house ________ he bought is very expensive．

用正确的关系代词填空。

“The early bird catches the worm”means“The person ________ is the earliest will get what she or he wants．”

读完课文后，你能回答下面的问题吗？

What did the landing on the moon make people realize?

________________

读完课文后，你能回答下面的问题吗？

What did they do on the moon?

________________