---What did you do last Friday?-Sam played chess and I played piano.A. the; theB. the

问题补充：

---What did you do last Friday?

---Sam played chess and I played piano.

A. the; the

B. the; /

C. /; the

D. a; the

答案：

A. the; the

B. the; /

(答案→)C. /; the

D. a; the

解析：句意：--上周五你们做了什么？--山姆下棋了，我弹钢琴了。这里play+球类运动或棋类；play+the国际乐器。故选C。