问题补充：
So convenient that many people would like to do that.
A. is shopping on net
B. shopping on net does
C. does shopping on net
D. shopping on net is
答案：
(答案→)A. is shopping on net
B. shopping on net does
C. does shopping on net
D. shopping on net is
解析：可联系答.案.网客服索取。
