把这些词填到下面的空中
forexample;infact;also;furthermore;notonlybutalso;inadditon
Teachersofforeignlanguagesshouldbeextremelywell-qualifiedinordertocarryouttheirdutiesproperly.15)______,ateachershouldpossessaminimumofagraduatedegreefromacertifiededucationschoolorinstituteifheistoteachhighschoolorbelow.Besidestheacademicdegree,teachersshouldnotconsiderteachingonlyasanoccupationforearningmoney;theyshouldalsobeinterestedinteaching.Itwas16)______necessarythatteachersbeknowledgeableintheirmajorfields,17)______theyshouldfurthermorebeskillfulaswell.18)______thelanguageteachermustknowthetargetlanguagewellenoughtobeimitatedbyhisstudents.Ateachershould19)______knowthelinguisticfactsofthelanguageofthestudentsinordertounderstandproblemstheywillhaveinlearningthetargetlanguage,20)______theteachermustbefamiliarwithaudio-lingualtechniques.Knowingallthiswillhelpthestudentstolearncorrectlyandquickly.
