一、.单项选择（本题共20小题；每小题1分，共20分）

(    ) 1.－Is your father a teacher?

－Well, he _______.

A. used to     B. was used to      

C. used to be        D. is used to be

(    ) 2. — What do cows eat?

— They eat__________ grass.

A. most        B. mostly          

C. almost     D. main

(    ) 3. His uncle        to   the  factory .He  will  be  back      an  hour .

A  has  gone  , after  B  has  been , in 

C  has  gone , in  D  has  been , after