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The significance of the role of collocations and idioms in the process of language instruction is well known, and the number of studies done in this field shows the importance of the instruction of collocations and idiomatic expressions. Correct production of language, whether written or spoken, is the aim of any language learning and in this respect not only it is essential to tap collocation knowledge for a better communication end, but it is also vital to perform well in written exams like university’s entrance exam and other standardized tests like TOLIMO, MCHE, TOEFL, IELTS, etc. because this knowledge is also tested in these examinations (McCarthy, 2005). Idiomatic expressions and particularly collocations are very important to especially non-native English learners, since the meaning of a word is determined by the co-occurring words, and this makes lexis independent from grammar. As a result, teachers and the learners, and also materials developers have to be aware of the importance of collocations and try to include them in their teaching and learning schedules.