9. What's the size of your normal group to Hong Kong?
你们去香港的旅游团一般有多大？
还能这样说：
How big is your normal tour group to Hong Kong?
How many people in your group to Hong Kong generally?
应用解析：
size作名词：尺寸，大小；多少；才干；声望；真相；
还可以作动词：按尺寸排列或分类；按一定尺寸制作；估算，估量尺寸大小。
10. Flying is a particularly safe way to travel.
乘飞机是非常安全的旅行方式。
还能这样说：
Taking the flight is very safe to travel.
A safe way to travel is by air.
谚语：
Time flies.
光阴似箭。
11. Do you prefer travelling by night or by day?
你喜欢在夜间旅行，还是在白天旅行？
还能这样说：
Which way do you like to travel, by night or by day?
What would you choose, night travel or day travel?
应用解析：
travel expense 差旅费；
travel agent 旅行社；旅行代理人；
travel service 旅游服务；
travel trade 旅游业
12. I would like a guide who speaks Spanish.
我想要一位讲西班牙语的导游。
还能这样说：
I am in need of a Spanish-speaking guide.
I want a people who can speak Spanish to guide me.
应用解析：
guide作名词：导游；指导者；指导；指南（+to）；入门书，简介（+to）；
作及物动词：为……领路，引导；指导，管理；支配（人）；给予极大的影响；
作不及物动词：担任向导。