The Tianwen﹣1 Probe landed on Mars___________ May 15th，2021.
| A． |
at |
B． |
in |
C． |
to |
D． |
on |
We usually have a flag﹣raising ceremony Monday.（ ）
| A． |
in |
B． |
at |
C． |
on |
D． |
for |
Kate felt excited to see a group of sheep walking _________ her into a village in Qinghai.
| A． |
over |
B． |
past |
C． |
across |
D． |
through |
You have to pass a test ____________ you can get a license.（ ）
| A． |
before |
B． |
after |
C． |
while |
D． |
until |
They go to school_______ bike.（ ）
| A． |
by |
B． |
with |
C． |
on |
The Monkey King can make 72 changes ________ his shape and size.（ ）
A．onB．inC．to
My classmates like to read English novels ___________ their free time.（ ）
A．inB．onC．atD．to
China successfully landed a spacecraft ________ Mars in May, 2021.
| A． |
in |
B． |
on |
C． |
at |
D． |
for |
In order to protect the environment，many people choose to go to work _____ subway.（ ）
| A． |
in |
B． |
on |
C． |
by |
The little boy hid himself ____________ the door to give his sister a surprise.（ ）
| A． |
behind |
B． |
above |
C． |
across |
D． |
under |
The Communist Party of China will have its 100th birthday ______ July 1，2021.
A．inB．onC．forD．at
Cathy always makes good use of her time to study，even _______ her lunch break.（ ）
| A． |
around |
B． |
during |
C． |
from |
D． |
between |
In summer evenings，many people enjoy taking walks ________ the river.（ ）
| A． |
on |
B． |
along |
C． |
in |
D． |
over |
— What happened to Tony？
— the morning of a rainy day，he a bike and hurt his legs.
A．In；put offB．On；fell off
C．In；fell offD．On；put off
Our hometown is a beautiful city ________ hundreds of lakes.（ ）
| A． |
at |
B． |
on |
C． |
with |
D． |
by |
We'll have a class meeting ________ 3：30 this afternoon.
| A． |
in |
B． |
on |
C． |
at |
There is a new TV________ the wall.（ ）
| A． |
at |
B． |
of |
C． |
on |
Our country has made great progress in the fight blue skies and clear waters.
A．inB．forC．againstD．between
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
﹣﹣﹣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 |
Chinese scientist Yuan Longping，renowned for developing the first hybird rice strain，died of organ failure at 91 May 22th，2021.