问题
选择题
When the fire broke out, Mary didn't know ___.
A．what to do
B．what do
C．to do what
D．what thing to do
答案
答案：A
Mary didn't know what to do意为: Mary不知道该做些什么? what to do作know的宾语.
搜题请搜索小程序“爱下问搜题”
When the fire broke out, Mary didn't know ___.
A．what to do
B．what do
C．to do what
D．what thing to do
答案：A
Mary didn't know what to do意为: Mary不知道该做些什么? what to do作know的宾语.