A:a: the
B:an;the
C:an;/
D:/;/
——I don't know if Aunt Li to look after these“stay-home children”tomorrow morning.——If he ,I will phone you.
当甲通过平面镜看到乙的眼睛时,乙一定能通过平面镜看到甲的眼睛,这说明在反射时 ____。
这两封家书,是针对儿子( )时而写的