we are the same age 表达对吗？

be of the same age同龄；他俩年龄相仿

所以该题应该选择C

2 他们都是27岁

They are all 27.

They are all at the age of 27.

3 我们两个人 / 我们三个人 都是 27 岁

Both of us/Two of us/We three/Three of us are all 27.

4 我春节期间去南非旅游了

I had a trip to South Africa during the Spring Festival.

I travelled to South Africa during the Spring Festival.

5 你春节去哪里旅游了？

Where did you travel to during the Spring Festival?

Where did you have a trip during the Spring Festival?