---Oh, you have a headache and a cough. _______have you been like this?
---Three days.
| A．How long | B．How soon |
| C．How often | D．How many |
I was________tired that I couldn’t go on walking．
| A．so |
| B．such |
| C．very |
| D．quite |
The sweet smell of the flowers in the garden comes in_______the open window，making us feel in a good mood(心情)．
A．on
B．with
C．through
Did you know that the earth is home to________animals？
| A．million |
| B．millions |
| C．million of |
| D．millions of |
The little girl was________nervous that she couldn’t say a word in public．
| A．so |
| B．such |
| C．too |
| D．very |
—How long have Mr．and Mrs．Smith________？
—For more than twenty years．
| A．married |
| B．had married |
| C．got married |
| D．been married |