Formal and Informal Writing Exercise

What is the difference between formal and informal writing in English? See below:)

FCE WRITING PART 1 PREPARATION

FORMAL and INFORMAL WRITING EXERCISE

by Bob Wilson at autoenglish.org

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FCE WRITING

FCE USE OF ENGLISH

OFFICIAL SITE

APOLOGISING

FORMAL	INFORMAL
I would just like to apologise for forgetting your birthday.	I'm really sorry I forgot your birthday.

EXPLAINING

FORMAL	INFORMAL
The first step would be to	What you need to do is...

EXPRESSING ENTHUSIASM

FORMAL	INFORMAL
I would just like to say I think that is excellent news.	I think that's fantastic news!

EXPRESSING PREFERENCES

FORMAL	INFORMAL
I would rather visit...	I'd really prefer to visit...

REQUESTING INFORMATION

FORMAL	INFORMAL
I would really appreciate it if you could forward the train times to me.	Can you send me the train times?

THANKING

FORMAL	INFORMAL
I just want to express my sincere thanks for all you have done.	Thanks a lot for everything you did for us.

SUGGESTING

FORMAL	INFORMAL
I recommend going to a Spanish restaurant.	You really must go to a Spanish restaurant.

Formal and Informal English

Which phrase is an informal apology?
1. I would just like to apologise for forgetting your birthday.
2. I'm really sorry I forgot your birthday.
3. Look, I just forgot, okay.
Which phrase expresses formal enthusiasm?
1. You're so lucky.
2. That's fantastic! Well done!
3. I would just like to say how pleased I am for you.
Which phrase is an informal request for information?
1. Send it to me immediately by attachment.
2. Can you send me a copy by email attachment, please?
3. I would really appreciate it if you could send me a copy by email attachment.
Which phrase expresses thanks in an informal way?
1. I would like to express my sincerest gratitude.
2. You shouldn't have bothered.
3. Thanks a lot. I'm much obliged.
Which phrase is a formal suggestion?
1. I recommend having lunch in this Chinese restaurant.
2. Let's have lunch in this Chinese restaurant!
3. We are having lunch in this Chinese restaurant.
Which phrase is for expressing a preference in a formal way?
1. I'm not doing that.
2. I don't want to do that.
3. I would rather not do that.
Which phrase is for giving instructions in a formal way?
1. The first step would be to make a plan.
2. First you need to make a plan.
3. Now make a plan.