—Shall we go on visit to Shanghai after the exam?—No. I have to practice playing piano.A.

问题补充：

—Shall we go on visit to Shanghai after the exam?

—No. I have to practice playing piano.

A. a; the

B. /; the

C. a; /

D. the; a

答案：

(答案→)A. a; the

B. /; the

C. a; /

D. the; a

解析：go on a visit to +地点，表示去某地参观，play后跟乐器要加定冠词the，故选A。