(   )6.Look at his hands .One is white ,______is black .

A.another   B.the others    C. other    D.the other

(   )7.The radio is broken . I don’t know ______.

A.what to do it   B. how to do    C. what to do   D. who to do

(   )8.Ask the boys to help ________to the juice ,Tom.

A.himself   B.themselves   C.ourselves   D. yourselves