sn’t it time you got down to ______the papers?　 (2006 重庆 )

A. mark　 B. be marked C. being marked　 D. marking

(2006·重庆)

Nobody believed his reason for being absent from the class ________ he had to meet his uncle at the airport.

[　　]

(2006·重庆)

--- How are you managing to do your work without an assistant?

--- Well, I ________ somehow.

[　　]

Nobody believed his reason for being absent form the class _______ he had to meet his uncle at the airport. （2006年重庆高考题）

A. why                         B. that　 　                     C. where                D. because