It is reported that heads of the stale 29foreign countries attended the Belt and Road Forum for International Cooperation（一带一路国际合作高峰论坛） May 14and 15，2017．（ ）
| A． |
in； at |
B． |
at for |
C． |
from；on |
D． |
of；in |
Jack， don't make a noise． The classmates are studying now．
Sorry， Mr． Brown．（ ）
| A． |
quietly |
B． |
clearly |
C． |
quickly |
D． |
politely |
Becky doesn't often eat breakfast．
Too bad． She doesn't realize the ____ of breakfast．（ ）
| A． |
secret |
B． |
hobby |
C． |
result |
D． |
importance |
Look! There is a girl under the tree．
She is Susan's daughter． She is only six years old， but she can ____ stories in English．（ ）
| A． |
say |
B． |
speak |
C． |
tell |
D． |
talk |
What are you going to do this afternoon？
I will go to the supermarket and buy _____ umbrella for climbing the mountains．（ ）
| A． |
a |
B． |
an |
C． |
the |
D． |
/ |
Must I hand in the report now， sir？
．You can hand it in tomorrow．（ ）
| A． |
Yes， you can |
B． |
Yes， you must |
| C． |
No， you needn't |
D． |
No， you mustn't |