H7N9 avian influenza（禽流感）is a new kind of____in the world．（ ）
| A． |
cough |
B． |
cancer |
C． |
discase |
D． |
medicine |
______ birds have come back because the environment here becomes better and better．（ ）
| A． |
Thousands of |
| B． |
Thousand of |
| C． |
Thousands |
It is ______ known that more and more foreigners are learning Chinese culture now．（ ）
| A． |
politely |
B． |
loudly |
C． |
widely |
Both Lily and Lucy ______ to the party yesterday，but they didn't come at all．（ ）
| A． |
were invited |
| B． |
was invited |
| C． |
invited |
Ode to Joy（欢乐颂）is a TV play ______ many people like．（ ）
| A． |
why |
B． |
that |
C． |
who |
You ______ cross the street when the traffic lights are red．（ ）
| A． |
needn't |
| B． |
don't have to |
| C． |
mustn't |