名词解释：offer
Hesaidthathe____(feed)upwithcollegeinstructorswhotriedtoteachhimtousethe“scientific
Theywrotealetterofthanksto________hadhelpedthem.
WenotefromyourletterofSeptember10ththatyouareinterested____walnutmeat.
Overemphasisontranslationwillusuallymakethelearner________thefirstlanguageinthelearningofthesecondlanguage.
