(    )1.Please listen    the teacher carefully .

A.  to   B. on  C. at  D. of

(    )2.There is    water on the floor. 

A.    too many  B. too much  C. much too  D. many too

(    )3.We don’t know Jack    Bruce.

A.    and   B. or   C. about   D. of

(    )4.She often    English with the classmates.

A.    practice speak  B. practices speak