Grammar errors

When you have finished eating in the restaurant, you ask the waiter for the account.

Can you please not talk so aloud because I can assure you I'm not really deaf.

They've saved up and gone on a cruise about the world and so they won't be home for at least 3 months.

You could not translate that new word to another language. Instead, your parents or someone else explained it for you.

Another word for 'customer' could be client or buyer. Customers are very important for some business because without them no company can exist.

It was worse of all in the winter as it was usually dark then.

Just one more thing, waiter, do I have to pay with cash or do you accept credit cards?

It's a story told in six hundred pages and it took me the best part of six weeks to read the total book.

They've searched everywhere for the thieves who stole half of their possessions but they've simply disappeared without sign.

I've just bought one of those new digital cameras. Would you like to have a look at some of the images I've been taking?