Question

At present，there is little doubt ________ short message plays an increasingly important role in our lives．

1. A.
   whether
2. B.
   if
3. C.
   that
4. D.
   which

Answer 1

C
解析：
考查doubt用法. there is no doubt that 否定就用thatthere is doubt whether/if 肯定就用whether/if，说明有疑问,后接同位语从句。Little表达否定意思很少的,故选C