His novels sell best and have made him famous, but before that no one could have imagined how great a role he ______ in the literary world．

A. had played        B. has played             C. is playing           D. was to play

He ____ in the north, but now he ____ here．

The little boy is dirty from head to foot because he______in the mud all morning.

　 A. has played 　      B. is playing

　 C. has been playing 　 D. was playing

—Didn’t the guard see him breaking into the bank??

—No, he ______ in the other direction.?

A. was looking? ? B. had looked?? ? C. looked????? ??? D. is looking

 He determined to teach in a western province, though he _______in the city for a better life.

A. could stay    B. would stay    C. could have stayed     D. had stayed