When the best singer in our class ， everyone shouted with excitement．（ ）
| A． |
took up |
B． |
put up |
C． |
showed up |
D． |
made up |
Fred hopes ______ his spoken English，so he practices it every day．（ ）
| A． |
improve |
B． |
improves |
C． |
improving |
D． |
to improve |
Is the woman Miss Zhao？
It ______ be her．She has gone to Qingdao for a meeting．（ ）
| A． |
can't |
B． |
needn't |
C． |
must |
D． |
may |
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 |