Sorry，Miss Liu．I left my workbook at home．Must I hand it in today？
No，you ______．You ______ bring it here tomorrow．（ ）
A．mustn't； shouldB．can't；must
C．mustn't；mayD．needn't；can
As students，we must study hard．______，we should care for our health．（ ）
| A． |
At the same time |
B． |
On the one hand |
| C． |
All in all |
D． |
In the end |
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 |