喝咖啡的时，放咖啡伴侣(奶粉)跟放鲜奶一样好喝吗？

1. A: 他要几个西瓜？/ B: 一个也不要。= 他不要任何西瓜。
(A: How many watermelons does he wants? / B: He doesn't want any.)

2. 喝咖啡的时候/喝咖啡时，放咖啡伴侣(奶粉)跟放鲜奶一样好喝吗？
(When drinking coffee, does coffeemate (powdered milk) taste as good as fresh milk?)

3. 请马上就下来找一找。
(Please come down immediately and look for it.)

4. A: 老板来了没有？/ B: 来了。
(A: Has the boss come in yet? / B: Yes.)

5. A: 你吃过木瓜吗？/ B: 吃过，可是她没吃过。
(A: Have you ever eaten a papaya? / B: Yes, but she hasn't.)

6. 离这儿不远。= 从这儿不远。 

(It's not far from here.)

离这儿不远 is correct. 从这儿不远 is wrong.  从... is always followed by a verb, like 从这儿走（walk from here），从这儿开始(start from here). 从 is simply a preposition, meaning "from”, but 离 is more like a verb, meaning "to be away from".

7. 你有一包卫生纸能借给我吗？
(Do you have a packet of toilet paper I could borrow from you?)

8. 他是加拿大人，他有个泰国女朋友。她22岁。
(He is Canadian and has a Thai girlfriend. She is 22 years old.)

9. 在书店往右拐，然后往左拐，就在(你)前边。
(If you turn right at the bookstore, then turn left, it's right in front of you.)

10. A: 一盒茶袋跟一盒茶叶有一样的价钱吗？/ B: 没有，茶叶更便宜。
(A: Is the price of a packet of tea bags the same as a price of tea leaves? / B: No, tea leaves are cheaper.)

Grammar of the question is correct, but it sounds unnatural. It would be better if you use 是一样的价钱吗 or 价钱是一样的吗