Grammar errors

The police in that country does not carry guns when they are in the street.

How many occasions have you been to France so far?

I will try very hard to come and have dinner at your house if I was able to.

Let me make it perfectly plane that if you decide to leave your job, I shall in no way try and stop you.

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

Nevertheless she made every effort to get to work on time to open the shop before customers arrived.

You see the job suited her down to the floor. The factory manufactured beds and they needed a new tester.

We went there on holiday. I remember it well but then that was before many years and it's probably changed since then.

When I was living in the country, I was used to get up very early to catch the train into the city.

I'm really boring with all this mail that comes through my door asking me to give money to this or that charity.