"Excuse me， could you tell me where I can buy a guidebook？"
"Sorry， I'm new here． You ________ ask the policeman over there．"（ ）
| A． |
shall |
B． |
can |
C． |
must |
Great changes have taken place in our city in the past ten years．Everything ______comes into sight is so new to me．（ ）
| A． |
that |
B． |
which |
C． |
who |
D． |
whom |
He Jing______to give a speech at the graduation ceremony at Harvard University last month．（ ）
| A． |
invites |
B． |
invited |
C． |
is invited |
D． |
was invited |
﹣It is reported that cancer can be controlled at a temperature lower than 100℃below zero．﹣Really？______ nice surprise!（ ）
| A． |
How |
B． |
What |
C． |
What a |
D． |
What an |
Unless the weather______，we'll have to cancel the picnic．（ ）
| A． |
improve |
B． |
improves |
C． |
improved |
D． |
will improve |
School violence______much attention of the whole society and people are calling on the government to make laws against it as early as possible．（ ）
| A． |
drew |
B． |
will draw |
C． |
has drawn |
D． |
was drawing |