初中简单英语题提问 求答案，求原因

Question

1.China is developing of all the countries in the world. A.fast B.faster C.fastest D.the most fastest 2.They want to develop a kind of dog-friendly food will help dog owners cool down their pets. A.who B.what C.which D.whether 3.——Have you found the information about the famous people you can use for the report? ——Not yet.I will search some on the Internet. A.who B.what C.whom D.which 4.——What are on show in the museum? ——Some photos by the children of Yushu,Qinghai. A.have been taken B.were taken C.are taken D.taken 另外，还想求指教：什么时候只能用what，不能用which 什么时候只能用which，不能用what

Answer 1

1.选C。由比较范围of
all
the
countries
in
the
world可知，应该用最高级。副词最高级前的the可以
省略
2.C.引导定语从句且在从句中做主语或宾语时可用that/which
3.D.同上。可理解为you
can
use
which
for
the
report,which指代前面的information
4.D.过去分词作定语。由于时态，不可选B.而A,C,均为句子，然后我们可以分析一下问句，
.——What
are
on
show
in
the
museum?
疑问词为what，而答句中some
photos
作主语，则将答句补充完整，some
photos----------by
the
children
of
Yushu,Qinghai
are
on
show.故我们应选择分词，photos与
children
是被做的关系，则选D
what不能用于定语从句，但which可以
what,which
连接代词，常用来引导名词性从句。在句中起连接作用并充当成分，本身又有词义。
In
one's
own
home
one
can
do
what
one
likes
.
His
income
today
is
double
what
it
was
five
years
ago
.
You
are
to
me
what
I
am
to
you
.
I
don't
know
which
answer
is
correct
.
当名词性从句中，在主句中作宾或主，且同时在从句中作宾或主，基本上可确定为what
同学，如果还有不清楚的可以再联系我
加油！