题目

Tips on Learning a New Language Before TravellingWhenever you travel to a foreign place, it is helpful knowing a bit of the local language.【1】But speaking the local language shows you care and it will help you mix with the locals easily. To learn a language, you do not have to take full time classes. You can follow some of the tips to pick up some basics quickly before that trip.Practise. The more you study the language, the better.【2】Think of it like learning an instrument or training for a marathon. The amount of time you'll need depends on the language you're learning, how often you 计算下面各题，怎样简便就怎样算。 （1）-+ （2）+++ （3）-（-） （4）-（+）+