I often do volunteer work in the library ______ Sundays.（ ）
| A． |
at |
B． |
in |
C． |
on |
D． |
for |
The Tianwen﹣1 Probe landed on Mars___________ May 15th，2021.
| A． |
at |
B． |
in |
C． |
to |
D． |
on |
The Monkey King can make 72 changes ________ his shape and size.（ ）
A．onB．inC．to
﹣﹣﹣This is so difficult that I want to give up.
﹣﹣﹣Take it easy .______ ，it takes time to learn something new.（ ）
| A． |
In that case |
B． |
For example |
| C． |
By the way |
D． |
After all |
They go to school_______ bike.（ ）
| A． |
by |
B． |
with |
C． |
on |
Football fans are often called the "12th man" because of their influence ______a team.
A．toB．fromC．onD．at
We usually have a flag﹣raising ceremony Monday.（ ）
| A． |
in |
B． |
at |
C． |
on |
D． |
for |
I eat rice beef and potatoes.It's delicious.（ ）
A．inB．onC．withD．for
Our country has made great progress in the fight blue skies and clear waters.
A．inB．forC．againstD．between
—I hear your brother will enter Tsinghua University this summer.
—Exactly，he was a born genius.He was able to read and write ________ the age of 4.（ ）
A．inB．onC．atD．of
The Communist Party of China will have its 100th birthday ______ July 1，2021.
A．inB．onC．forD．at
— I could tell the look on her face that something exciting had happened.
— Exactly!（ ）
A．onB．withC．byD．at
Since 1921,the Communist Party of China（中国共产党）has been leading the Chinese people a better life.（ ）
A．ofB．onC．atD．to
The Communist Party of China will have its 100th birthday July 1，2021.（ ）
A．inB．atC．onD．around
_____ such a cold morning，I also got up______ 6 o'clock to go for a run as usual.（ ）
| A． |
Before；in |
B． |
At；to |
C． |
On；at |
D． |
In；at |
I often go to school_______ foot.（ ）
| A． |
in |
B． |
by |
C． |
on |
D． |
at |
My classmates like to read English novels ___________ their free time.（ ）
A．inB．onC．atD．to
We left __________such a hurry that we forgot our tickets.（ ）
| A． |
on |
B． |
for |
C． |
to |
D． |
in |
Space Day of China falls________ April 24th every year.（ ）
A．onB．byC．atD．in
Sansha，a beautiful city，lies ____________ the south of China.
| A． |
in |
B． |
on |
C． |
to |