–Do you still remember the city ____ we visited last year ?--You mean Zhengzhou? I know there is a factory____ your mother worked. 
#42934
A
that, which
B
where, that
C
which, where
D
where, where
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Is this the reason ______ at the meeting for his carelessness in his work?
#43072
A
he explained
B
what he explained
C
how he explained
D
why he explained