Since 2021, our school ________ all kinds of after-school services for students.
| A． |
provides |
B． |
is providing |
C． |
has provided |
New energy cars have been ______ to cut down air pollution．（ ）
| A． |
discovered |
B． |
found |
C． |
invented |
D． |
refused |
He tried many ways to solve the problem．But ______ of them worked．（ ）
| A． |
neither |
B． |
none |
C． |
all |
D． |
both |
We are going to have a party ______ the evening of June 30th．（ ）
| A． |
on |
B． |
in |
C． |
at |
D． |
for |
I'm sorry I took your card by mistake，but where is ______？（ ）
| A． |
hers |
B． |
theirs |
C． |
yours |
D． |
mine |
Though Bill is very young，he has a lot of ______ about Chinese history．（ ）
| A． |
information |
B． |
knowledge |
| C． |
background |
D． |
experience |