一．单项选择13
( )1. ____ the teachers in the school is one hundred, and ___ of them are women teachers.
A. A number of; four-fifth B. The number of; four-fifth
C. A number of; four-fifths D. The number of; four-fifths
( )2.．—I'm sorry, sir．I can’t finish the work on time，
—Never mind． ，the work is quite difficult．
A．At least B．For example C．After all D．First of all
( )3．The art club is for members only．You can’t go in you are a member．
A．unless B．because C．if D．though
