He disappeared last month, _______ we have heard nothing of him.
#69495
A
when
B
after which
C
from which
D
since when
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Football, ________ is an interesting game, is played all over the world.
#68690
A
that
B
which
C
it
D
who
The infrastructure of a country is makes everything run smoothly， including things like transport， irrigation， electricity， postal service， telephones and schools.
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A
that
B
what
C
which
D
as
The school shop, customers are mainly students, is closed for the holidays.
#68978
A
which
B
whose
C
when
D
where