This study investigates the interpretation of scopally ambiguous sentences containing noun phrases with double quantified constituents from a processing perspective. The questions this study tried to answer were: whether or not the preferred interpretation for doubly quantified ambiguous sentences in English was influenced by English learners' L1 scope interpretation possibilities; whether or not the preferred interpretation of ambiguous sentences with double quantificational noun phrases was driven by surface configurations of sentences in English and Persian for SL learners of English either in off-line or on-line reading; and finally, whether or not the referential contexts of ambiguous sentences with double quantificational noun phrases in English and in Persian guided interpretation preferences for SL learners in off-line and on-line readings. Using an off-line judgment task and an on-line truth-value judgment task combined with a self-paced reading technique, the data of the study were collected from the Persian speakers and English learners. The results obtained from offline tasks indicated that the interpretation preferences of L2 learners of English were influenced by their background language. However, such influences were not found in the self-paced study. Furthermore, it was indicated that the surface configurations of sentences strongly affected L2 learners' interpretation preferences favoring isomorphic interpretation for the universal quantifiers included in the subject position. Concerning the semantically referential-context effect on ambiguity resolution, the collected data revealed that context played a crucial role in the processing of scope ambiguity since the RTs for a contextualized stimuli were more than for contextualized ones in constructions with QNP-QNP in Persian and English.