Nobody could solve this difficult problem alone_____________ others'help．（ ）
A．withB．forC．withoutD．from
How delicious the meal is! Did Kangkang's mother cook it？
It be her．These days she has been in a poor village to help the people there．（ ）
| A． |
can't |
B． |
won't |
C． |
mustn't |
D． |
needn't |
My English is poor．Could you help me with it？
．（ ）
| A． |
Thank you |
B． |
Me， too |
C． |
No problem |
D． |
See you |
How long have you had the cellphone， Kang kang？
I've had it two months．It helps me a lot．（ ）
| A． |
for |
B． |
since |
C． |
in |
D． |
on |
Are there any notebooks on COVID﹣19（新冠肺炎病毒） in your school？
，They tell us how to protect ourselves in this big event．（ ）
| A． |
Yes， they are |
B． |
Yes， there are |
| C． |
Yes， there is |
D． |
Yes， it is |
To keep our city clean and beautiful the are always very busy in the street．
They should be respected by all the people．（ ）
| A． |
drivers |
B． |
postmen |
C． |
firemen |
D． |
cleaners |