(    )1. The number of the students in our grade ________about six _______,of them are girls.

A. are, hundreds, two- thirds      

B. is, hundred, two- third

C. is, hundred, two thirds.        

D. are, hundreds, two third

(    )2. He had _________ much work to do that he couldn't go out.

A. so   B. such   C. as   D. or

(    ) 3. _______ my mother ________ my sister watches TV plays these days.

A. Either, nor   B. Both, and    

C. Neither, or     D. Neither, nor