随堂演练即时体验 巩固提升 ⅰ.单句语法填空(不多于3个单词) 1．the climate has a great influence ________ agricultural production. 答案与解析 on have an influence on“对……有影响”。 2. when they ________ (hear) the news, they all jumped with joy. 答案 heard 3. the students ________ (sing) as they walked.
