Sorry! I am late (because/because of) the traffic.
Sorry! I am late BECAUSE OF the traffic.
I came here (because/because of) I want to talk to you.
I came here BECAUSE I want to talk to you.
There have been a lot of problems in Britain (because/because of) the Mad Cow Disease.
There have been a lot of problems in Britain BECAUSE OF the Mad Cow Disease.
He couldn't run (because/because of) his old age.
He couldn't run BECAUSE OF his old age.
The meeting was postponed (because/because of) the bad weather.
The meeting was postponed BECAUSE OF the bad weather.
They came to London (because/because of) he got a job there.
They came to London BECAUSE he got a job there.
The newspaper was prosecuted (because/because of) an article about the government.
The newspaper was prosecuted BECAUSE OF an article about the government.
Leila left early (because/because of) she was tired.
Leila left early BECAUSE she was tired.
We had to hurry indoors (because/because of) it was raining.
We had to hurry indoors BECAUSE it was raining.
Paul had a terrible accident (because/because of) he was driving fast.
Paul had a terrible accident BECAUSE he was driving fast.
He can't drive (because/because of) his illness.
He can't drive BECAUSE OF his illness.
It was all (because/because of) her that we got into trouble.
It was all BECAUSE OF her that we got into trouble.
We stopped playing tennis (because/because of) the rain.
We stopped playing tennis BECAUSE OF the rain.
He lost his driving licence (because/because of) he was convicted of drinking and driving.
He lost his driving licence BECAUSE he was convicted of drinking and driving.
She got the best grades (because/because of) she had worked hard.
She got the best grades BECAUSE she had worked hard.
She could only eat a salad in the restaurant (because/because of) she is a vegetarian.
She could only eat a salad in the restaurant BECAUSE she is a vegetarian.
She found the exam easy (because/because of) she had worked hard during the course.
She found the exam easy BECAUSE she had worked hard during the course.