Question

I want to know ______ for the class yesterday morning.

A．why did you come late	B．why you came late
C．why do you come late	D．why you come late

Answer 1

B

本题know后跟的是一个宾语从句，用正常顺序，故不选AC，本题有过去的时间昨天上午，从句使用的是过去时，故本题选B。