ⅰ.语法填空,单句训练 1.the boss wanted an assistant with ________ knowledge of french and ________ work experience. 答案:a;不填 knowledge指具有对某一具体事物或具体学科的知识时,应与不定冠词连用,a knowledge of意为“具有……的知识”,所以第一个空应选a;根据句意判断第二个空后面的work experience意为“工作经验”,experience不可数,所以不填。 2.(2015·厦门高三月考改编)the flood this summer caused serious ________ to the crops in