有关定语从句练习的问题

这三个句子都是问句，而做题时都要把它们转换成陈述句来做
1.Is
this
the
factory
_____a_____
you
visited
the
other
day?变为
thi
is
the
factory(
which/that
)you
visited
the
other
day.很明显定语从句中缺宾语，visit
是及物动词要带宾语的，所以用WHICH
/THAT
都可以代替factory。
3.
Is
this
factory
____d______
some
foreign
friends
visited
last
Friday?变为陈述句为
this
factory
is
(
the
one
)
some
foreign
friends
visited
last
friday
.这句中THE
ONE
是先行词，在主句中做表语，4个选择项中只有THE
ONE
既可以做从句的宾语又可以做主句的表语,这是个同位语从句。
4.
Is
this
the
factory
____b______
he
worked
ten
years
ago?
变为陈述句为
this
is
the
factory
(
where)he
worked
ten
years
ago
从句中WORK
是不及物动词，成分不缺