English(单选题) (1)They can speak ____ foreign languages.A.a li

English(单选题)
(1)They can speak ____ foreign languages.
A.a little B.a few C.few D.little
(2)We often go to school five days ____ week.
A.a B.an C.the D.all
(3)We don't know ___ names.
A.each other B.each other's
C.each others' D.each's
不是翻译,是解释为什么选择这个答案.