问题
Ren Xue’an, a marketing director of CCTV, says that the country’s TV producers need to what is truly valuable.
A:insist looking for
B:insist on looking for
C:insist on to look for
D:insist to look for;
B:insist on looking for
C:insist on to look for
D:insist to look for;
正确答案是：
