The writer and teacher Smith ______ through millions of ups and downs since he moved to Sydney.
[     ]
A. have gone
B. had gone
C. went
D. has gone
My father and my mother have been married for 30 years, and never once ____ with each other.
[     ]
A. have they quarreled
B. they have quarreled
C. did they quarrel
D. had they quarreled
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