The purpose of the study is to investigate Taiwanese EFL learners' parsing strategies while they process English (L2) sentences. The syntactic structure under investigation is relative clause attachment ambiguities in ”two-site contexts”, namely, a complex NP (NP1-of-NP2 and NP1-with-NP2) followed by a relative clause. A total of sixty freshmen at an Institute of Technology in northern Taiwan participated in the experiment. Data collected by means of a carefully designed questionnaire were analyzed by a t-test and a one-way ANOVA. Results showed that a) the EFL learners preferred to attach the relative clause high to the first NP, and b) they were not sensitive to the lexical semantic information carried by with. The findings suggested that the principle of late closure might not be universal, and during sentence comprehension learners might have drawn on other parsing principles and were under the influence of properties of L1.