In this B2 exercise the student had to complete the second sentence so that it had a similar meaning to the first sentence, using the word given in block capital letters. The student must not change the word given and they can only use between two and five words in the space.
36. ‘Sometimes tiredness causes the machine operators to make mistakes.
Sometimes mistakes …………………………………………… the tiredness of the machine operators.
A student of mine wrote
“Sometimes mistakes ARE CAUSED BECAUSE OF the tiredness of the machine operators.”
The textbook, published by Cambridge, says the following are the correct solutions
36 are made OR occur/happen | because of
I understand that Cambridge solutions work better, but I'm not sure why my student's solution is wrong. Is caused and because in the same sentence redundant? And yet, the Internet has many many examples of sentences containing the string: “caused because (of)”
Googling yielded these examples:
More specifically, the operator should be held strictly liable when environmental damage is caused because of a malfunction in the operation of the activity or when the damage is caused by an accident. Official Journal of European Communities
The physical phenomenon Condensation is caused because the air in the room contains a certain amount of steam which can come from various…
No sustainable and avoidable damages shall be caused because of service works
This situation may be caused because of the dimensionality of the feature vectors.
EEG Analysis Techniques and Applications
Symptoms are caused because of too much stomach acid and include: Acid reflux;...
University of Rochester Medical Center
Seasons are caused because of the Earth's changing relationship to the Sun.
Sadly, more than a year later and Stephanie is dealing with the aftermath of the virus. It’s what she calls an onslaught of symptoms that were caused because of the virus.
I suggested that the following worked better without "because" and that the preposition by was necessary.
Sometimes mistakes ARE CAUSED BY the tiredness of the machine operators.
However, can someone please explain why the student's solution was inappropriate.