[A]Hello im university student and going to be an english teacher here in turkey . I have problems about tenses.I have three long cloze passages in my exams.I hardly guess which tenses are suitable to the blanks in passages.I dont know many word maybe this is the problem anyway I cant understand what is told in a passage.Also passages are really difficult about science politics and have a few adverb of time.

So what can I do to be sure about which tenses are suitable when?if you give some advice I would be really happy