Mark Zuckerberg is the founder of the site Facebook, ______ you can have a look at each other’s pictures.
#78476
A
where
B
which
C
when
D
as
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My brother’s bedroom is always a mess, and he can never find anything, _________ is very frustrating.
#75351
A
where
B
whom
C
when
D
which
I just wonder _______that upsets him so much.
#78075
A
what it is
B
what he does
C
how it is
D
why it does
The only system I know ____ will help you remember what you have heard at a lecture is the system of keeping notes.
#75516
A
what
B
that
C
where
D
one