完形补文：下面的短文有十处空白,每处空白后的括号内有一个词,请根据短文内容将其正确的形式填入文中,以恢复文章原貌。

     In order to learn a foreign language well, it is _________(necessity) to overcome the fear of making _________(mistake). If the primary goal of language use is _________(communicate),then mistakes are secondary considerations that may be _________(deal) with gradually as awareness of those mistakes increases. On the other hand, students should not ignore their mistakes. The language learner may observe how native speakers express _________(them), and how native expressions differ from the way the learner might say them. For example, a Spanish speaker who has been saying "I do it" to express _________(will) to do something in the _________(immediately) future, could, by interacting with native speakers of English observe that native speakers _________( actual) say "I'll do it". The resulting discrepancy can serve as a _________(basic) for the student to modify his way of using the present tense in English. But a student who is unwilling to interact in the first place would lose this opportunity of learning by _________(try) and error.