Question

一道英语选择题 PS:请写出为什么

Thanksgiving Day is an important traditional festivial ____ Americans have observed for about 400 years.
A.that B.what C.it D.one

Answer 1

选择A
这个是定语从句，其中that是定语，代表前面提到的thanks giving day。如果把句子拆开，就是Thanks giving Day is an important traditional festivial ， Americans have observed thanks giving day for about 400 years.

Answer 2

A
这是一个定语从句，首先看从句的完整性，明显，缺宾语，因为从句修饰的是先行词Thanksgiving Day,所以用关系代词that，这是语法固定搭配，没法解释的。

Answer 3

0`5^7`1—6`5^1`1—7·3·3·5

Answer 4

A定语从句

Answer 5

A 定语从句。