join pairs of sentences by using comma plus a joining word (and, but, although, because, which or who)

Using a comma plus a joining word (and, but, although, because, which or who), join these pairs of sentences.

The dog ate his dinner. He didn’t chase the cat.
The dog ate his dinner, and he didn’t chase the cat.

She was upset. She had missed the last train home.
She was upset, because she had missed the last train home.

Tom was at a football match. He had a party to go to later.
Tom was at a football match, although he had a party to go to later.

Selma bought some expensive shoes. She now had no money left.
Selma bought some expensive shoe, and she now had no money left.

Fred found a fifty pound note on the pavement. It was a fake.
Fred found a fifty pound note on the pavement, but It was a fake.