The ________ pollution is becoming more and more serious，We haven't seen blue skies for several days．（ ）
| A． |
noise |
B． |
water |
C． |
air |
I wonder＿＿＿＿＿.
| A． |
that April is the hottest month in Thailand |
B． |
do you know where I can buy some medicine |
| C． |
whether June is a good time to visit Gansu |
D． |
how can I improve my pronunciation |
Paper ＿＿＿＿＿ in ancient China more than 2,000 years ago.
| A． |
invented |
B． |
was invented |
C． |
invent |
D． |
is invented |
— Shall we have an outdoor graduation party after the exam?
—＿＿＿＿＿I think everyone will love it.
| A． |
Good idea. |
B． |
No way. |
C． |
Enjoy yourself. |
D． |
The same to you. |
Linda spoke too quietly. I could＿＿＿＿＿hear her at the back.
| A． |
always |
B． |
ever |
C． |
hardly |
D． |
usually |
—＿＿＿＿＿do you exercise?
— Every day.
| A． |
How long |
B． |
Why |
C． |
What time |
D． |
How often |