用that
,
附：宜用that，不用which或who，whom的场合
1.
当先行词是
不定代词或被不定代词修饰时。如
Tell
me
everything
that
you
know.
/
All
the
people
that
are
working
are
my
workmates.
2.
当先行词是
序数词或被序数词修饰时。如
I
want
the
first
that
looks
bigger.
/
This
is
the
third
dictionary
that
I
have
used.
3.
当先行词是最高级或被最高级修饰时。如
Tom
is
the
best
that
I
have
ever
taught.
/
The
most
important
thing
that
she
can
do
is
to
go
to
bed
at
once.
4.
当先行词是the
only
(“唯一的”)，the
very
(“恰恰；就”)，the
just
(“恰恰；就”)，the
same
(“相同的”)，the
last
(“最后一个”)等或被这些词修饰时。如
The
only
thing
that
I
need
to
do
is
to
cook
a
meal.
/
He’s
the
very
person
that
I
want
to
find.
/
Did
you
miss
the
last
problem
that
is
in
your
math
test?
5.
当先行词是数词时。如
You
can
catch
the
four
that
are
dead.
6.
当先行词作表语时。如
My
hometown
is
no
longer
the
place
that
it
used
to
be.
7.
当先行词中既有人，又有物时。The
young
man
and
his
bike
that
I
saw
just
now
are
still
there.
8.
当句子中含有两个
定语从句时，如果其中一个定语从句的引导词用了which、who、whom，则另一个定语从句的引导词用that，以避免重复。
如
The
TV
set
which
I
bought
from
the
shop
that
opened
last
month
was
broken.
/
The
man
who
is
standing
behind
the
people
that
are
playing
cards
is
my
uncle.
9.
当which、who、whom作疑问词，引导
特殊疑问句时。如
Which
took
the
camera
that
was
made
in
Japan?
/
Who
knows
the
boy
that
lives
upstairs?