-- Have you been to the Great Wall?-- Perhaps not in my memory. _______, it might have been during my early childhood.
#64395
A
If any
B
If ever
C
If once
D
If not
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In the end, she _____________for the future.
#70893
A
told to us her plan
B
unfolded to us her plan
C
reminded to us her plan
D
explained us her plan
Wastes from the factory ______the water pollution in this area. 
#72065
A
resulted from
B
paid off
C
paid back
D
resulted in