人们经常在草坪上行走,会造成土壤板结,从而影响草的生长.土壤板结影响植物生长的主要原因是( ) A. 植物缺少无机盐,影响生长 B. 植物缺少水,影响光合作用 C. 土壤缺少氧气,影响根的呼吸 D. 气孔关闭,影响蒸腾作用 答案:C—— Oh, what a pity! I
______ to bring the photos I wanted to show you. I shouldn’t have left them at
home.
—— Maybe next time.
A. forget B.
forgot C. had forgotten D.
have forgotten