Depend prepositions

1) Replace the incorrect prepositions in the following sentences with the correct ones.

1. You can reduce your vulnerability
   for
   to
   stress by taking a nap in the afternoon.
2. I play tennis - but just
   in
   for
   fun. I'm not very good at it.
3. I've no idea why Tony is so angry. He never confides
   with
   in
   me.
4. Jane's out in the garden mulling
   through
   over
   a problem to do with work.
5. There's no need to exercise
   at
   to
   the point of exhaustion.
6. At weekends, I like to immerse myself
   with
   in
   the peace and quiet of the countryside.
7. Bob's finding it hard to focus his mind
   in
   on
   his studies at the moment.
8. Dentists fall
   on
   into
   the category of high-stress occupations.
9. One of the greatest causes of stress
   at
   in
   the workplace is the feeling at being undervalued.
10. Moving house often has a negative effect
    for
    on
    people's mental health.

2) Complete the following sentences with the correct preposition.

1. All new models have been fitted
   ___
   with
   a safety lock.
2. You look really scruffy. Can't you tuck your shirt
   ___
   into
   your trousers at least?
3. The main part of the house is very old. It dates
   ___
   back
   more than 400 years.
4. The sudden movement of the train threw me
   ___
   off
   balance and I fell head-first down he steps.
5. Erica is an excellent colleague. She goes
   ___
   about
   her job calmly and efficiently.
6. The school ran
   ___
   into
   financial trouble when 80% of the staff went on strike.
7. As soon as the president stepped out of the car, guards moved
   ___
   into
   action to hold back the crowds.
8. The price of shares in the company went up
   ___
   by
   over 50% when they announced the discovery of the new oilfield.
9. We've decided to switch
   ___
   from
   electricity
   ___
   to
   solar power in an attempt to be more eco-friendly.
10. The over-use of fertilisers and pesticides is one of the greatest threats
    ___
    to
    wildlife today.