I often visit my parents, who live in the countryside  whenever ____.
#92836
A
I am convenient
B
it will be convenient to me
C
I will be convenient
D
it is convenient to me
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It was in the street ______ I met John yesterday. 
#93804
A
where
B
which
C
that
D
when
It was the first time Mary _____ such a big opening ceremony.
#92294
A
has attended
B
attended
C
had attended
D
should attend