سؤال فى امتحان السودان

[اسلام احمد محمود]

13-At school, we are to ............ how to revise for our exams.
a) being taught b) teaching c)been taught d)be taught
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Find the mistake
1)When we arrived home, we saw that our lights have been left on.

[عبد الرحمن أحمد عبد الجواد]

being taught
had been left