--What did your mother say just now?--She asked me ________.

题目

--What did your mother say just now?--She asked me ________.
A.when my sister comes back B.when my sister will come back
C.when my sisterwould come back D.when did my sister come back

答案

C
因为主句里动词是asked ,过去时态,所以从句也要用相应的过去时,即过去将来时~因为sister还没回来呢.