—Its time to go to bed Betty! —OK. Mum.A. Good morningB. Good nightC. Good eveningD. Go

问题补充：

—Its time to go to bed, Betty! —OK., Mum.

A. Good morning

B. Good night

C. Good evening

D. Good afternoon

答案：

A. Good morning

(答案→)B. Good night

C. Good evening

D. Good afternoon

解析：句意：到睡觉的时间了，Betty! 好的，晚安，妈妈。It’s time to do…到做….的时间了；to to bed睡觉；A早上好，B晚安，C晚上好，D下午好，结合语境选C