Is it the years  _______  you worked in Africa as a doctor  _______  have a great effect on your literary works? 
#4975
A
that; where
B
that; that
C
when; where
D
when; that
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It ______ quite correct that happiness comes from thinking about things in a positive way.
#4973
A
has turned out
B
has been turned out
C
is turning out
D
is turned out
.Jenny, your paintings are wonderful. I _____ you learned to paint.
#4747
A
hadn’t known
B
didn’t know
C
won’t know
D
haven’t known