填空1 I must l--early because I have something important to do

few, a few是可数的, little, a little是不可数的,而a few, a little含肯定意味,few, little含否定意味.由few (= not many; hardly any)含否定意义；a few (= some; several; a small number of) 含肯定意义.此处可知应选D.
第一个填空为leave表离开, 第二个填空为less表少说话.