Difference between: trip / excursion / tour Are there any differences between these words? Or can I use them interchangeably?

Travel to London I'm going to London at the end of August and I'd like to ask about places which are worth to see there. I mean not typical tourist places, but places that aren't mentioned in travelbooks :) or maybe what should I avoid? I'll be very grateful for each advice, I love discovering new places :)

Is it better to go shopping in small local businesses or large out-of-town shopping center? Nowadays, more and more people prefer doing shopping in shopping centres than in small shops. The main reason of that is this is more comfortable for them. People, especially who live in big cities, are usually busy and hard-working. Doing shopping in shopping centres, where they can find and buy almost everything, makes shopping faster. You can buy food, clothes, even furniture, in one place. Additionally, prices are usually lower in large shops, what’s a huge plus, obviously. From the other hand, if we focus more on this topic, we can found out that supermarkets offer lower prices than small shops are able to, because of few reasons. At first, they order bigger amounts of food, for example, so they can get discounts from producers. Moreover foreign big companies, whose supermarkets are, usually don’t have to pay high taxes like shopkeepers have to. As I said, doing shopping in small local shops is definitely more expensive. Shopkeepers have to buy lower amounts of food, so they can’t get big discounts and they aren’t able to make prices lower. Furthermore, this is very often their only one work and they have to ensure their families good living conditions. I can’t forget about taxes, salaries for their employees and so on. Everything is a piece of the whole of price. To sum up, this is really hard question. In my opinion, doing shopping in small local shops is much better, because we support local businesses. I think we should do that in every case when we have these possibilities. Unfortunately, not everyone has time and money to do that.

Differences between present perfect simple and present perfect continuous Can anyone explain me differences between present perfect simple and present perfect continuous? I know general rules, I've read some grammar books but I still don't know which one I have to use in particular situations. Thank you very much in advance :)

Look for answer about stative verbs I'm going to language school since September and recently I've learnt about stative verbs like "like, love, hate, prefer, know etc". My teacher said these words don't have gerund form. Is it true in real english? I mean for example famous McDonald's "I'm loving it" .