Even more help with the Chinese language, is it possible?

Hello!

I was wondering if anyone could help me, I wrote some sentences. I wonder if they are correct? I hopefully will be going to China soon, in time for the Olympics! (but I won't be in Beijing).

Lesson 34 Who/Whose?

他 是 谁? Who is he?
你的 经理 是 谁? Who is your manager?
你的 学生 是 谁? Who is your student?
郑 先生 是 谁? Who is Mr. Zheng?
朱 小姐 是 谁? Who is Ms. Zhu?
他 在 跟 谁 说话? Who is he speaking with?
她 在 跟 谁 说话? Who is she speaking with?
刘 先生 在 跟 谁 说话? Who is Mr. Liu speaking with?
谁 买 的? Who bought it?
这个 是 谁的 錶? Whose watch is this?
这个 是 谁的 名片 ? Whose name card is this?
这个 是 谁的 本子? Whose notebook is this?
这个 是 谁的 手机? Whose cell phone is this?
这个 是 谁的  课本? Whose textbook is this?
这个 是 谁的  雨伞。Whose umbrella is this?
这个 是 谁的  词典? Whose dictionary is this?
这个 是 谁的  电脑? Whose computer is this?
这个 是 谁的   护照? Whose passport is this?
这个 是 谁的 报纸? Whose newspaper is this?
这个 是 谁的  筷子? Whose chopsticks are these?
这个 是 谁的  地图? Whose map is this?

谁是你的学生？

谁是朱小姐？

我认为这样会更好.

you don't need to say "个"

the same as Small-Q , remove all these"个“

good!!!!!!!

你的 经理 是 谁? Who is your manager? we also say 谁是你的经理？

你的 学生 是 谁? Who is your student?we also say 谁是你的学生？

郑 先生 是 谁? Who is Mr. Zheng?we also say 谁是郑先生？
朱 小姐 是 谁? Who is Ms. Zhu?we also say 谁是朱小姐？

他 在 跟 谁 说话? Who is he speaking with? we also say 谁正在和他说话？
她 在 跟 谁 说话? Who is she speaking with?we also say 谁正在和她说话？

刘 先生 在 跟 谁 说话? Who is Mr. Liu speaking with?we also say 谁正在和刘先生说话？

这个 是 谁的  筷子? Whose chopsticks are these? you should say 这些是谁的筷子？