Question

【題目】The professor made a great contribution to improving his students' listening and speaking ________ (skill)．

Answer 1

【答案】skills

【解析】

句意為：這位教授對他的學生的聽力和口語________的提高做了很大的貢獻。根據語境可知此處指聽力和口語技巧，應用名詞的復數，故填skills。