选择：Mother dogs have several babies _____.A.on a time B.at a time _英语解答

选择：Mother dogs have several babies _____.A.on a time B.at a time C.at times D.for a time

人气：248 ℃　时间：2019-08-19 10:08:32

解答

A 没这么个词组
B 每次;一次
C 随时,永远
D 暂时;一度
所以选B,母狗每次都会生出好几只小狗