---I think English is math. ---Yes, I think so.
| A．much important than | B．so important as |
| C．as important as | D．as more important as |
—Susan, what are the advantages of MP5 players?
—Mom, they are smaller and lighter ______ they can be carried very easily.
| A．unless | B．if | C．until | D．so that |
She is always listening to music ____doing her homework.
| A．as | B．while | C．until | D．though |
Someone called me up in the middle of the night, but they hung up I could answer the phone.
| A．as | B．since | C．until | D．before |
I will go to visit my aunt in England ______ the summer holiday starts.
| A．while | B．since |
| C．until | D．as soon as |
The little boy is only six years old, _________ he can make wonderful model cars.
| A．so | B．or | C．but | D．/ |