We should avoid ________ untrue claims about the products or services.

       A. falling behind        B. falling for         C. to fall behind      D. to fall for

We should avoid ________ untrue claims about the products or services.

       A. falling behind        B. falling for         C. to fall behind      D. to fall for

We should avoid ________ untrue claims about the products or services.

A. falling behind　 B. falling for　　　　 　 C. to fall behind　　 D. to fall for

We should avoid ________ untrue claims about the products or services.