Here are the sentences completed with the correct past simple forms of the verbs:

1. I got to the post office just before it closed and **sent** the letter.
2. We invited Stephanie to the party, but she **didn't come**.
3. Jack lost his job because he **made** too many mistakes.
4. Everyone **knew** that it was Bill's fault, but nobody said anything.
5. Karen **took** the keys from the kitchen table and ran out the door.
6. I was bored, so Mum **gave** me some money to go shopping.
7. Do you remember the time we **went** to India on holiday?
8. It started raining, but luckily I **had** an umbrella in my bag.