Writeacher, could you please check these other sentences. Thank you.

Fill in the blanks with a suitable preposition.

1) I regret ….. inform you that you didn’t pass your FCE test.
2) Lucy dreams of………(go) to live in Australia. The fire officer warned us against …………… (leave) the heater on.
3) I can’t afford ……. (go) on holiday this year.
4) She offered …… (drive) me to the beach.
5) The boss threatened …… (dismiss) me. The teacher made me ……(rewrite) the exercise.
6) I got my brother ……(lend) me his new jacket.
7) I watched my husband …… (wash) the car from top to bottom. It’s not use …. (try) to persuade him to come.
8) They agreed…. (let) us go to the cinema. I don’t mind ………… (go out) in this weather.
9) I’m not used to …… (do) the washing every day. I’m waiting for Mark …… (finish) his homework.
10) Can you remind me ….. (switch off) the printer?

The directions are incorrect. Not all the blanks will be filled with only a preposition.

Fill in the blanks with a suitable word or phrase.

1) I regret to inform you that you didn’t pass your FCE test.

2) Lucy dreams of going to live in Australia. The fire officer warned us against leaving the heater on.

3) I can’t afford to go on holiday this year.

4) She offered to drive me to the beach.

5) The boss threatened to dismiss me. The teacher made me rewrite the exercise.

6) I got my brother to lend me his new jacket.

7) I watched my husband wash the car from top to bottom. There's no use trying to persuade him to come.

8) They agreed tolet us go to the cinema. I don’t mind going out in this weather.

9) I’m not used to doing the washing every day. I’m waiting for Mark to finish his homework.

10) Can you remind me to switch off the printer?

In addition, when you use "to" when forming infinitives, it's not a preposition. It's part of the verb form.

These are infinitives:
to inform
to go
to drive
to dismiss
to lend
to let
to finish
to switch off

1) I regret to inform you that you didn't pass your FCE test.

2) Lucy dreams of going to live in Australia. The fire officer warned us against leaving the heater on.
3) I can't afford to go on holiday this year.
4) She offered to drive me to the beach.
5) The boss threatened to dismiss me. The teacher made me rewrite the exercise.
6) I got my brother to lend me his new jacket.
7) I watched my husband wash the car from top to bottom. It's not useful to try to persuade him to come.
8) They agreed to let us go to the cinema. I don't mind going out in this weather.
9) I'm not used to doing the washing every day. I'm waiting for Mark to finish his homework.
10) Can you remind me to switch off the printer?