When the fire broke out, Mary didn't know .A. what to doB. what doC. to do whatD. what thi

发布时间：2020-08-15 01:43:31

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

网友回答

(答案→)A. what to do
B. what do
C. to do what
D. what thing to do
解析：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.
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