问题
选择题
At present，there is little doubt ________ short message plays an increasingly important role in our lives．
A．whether
B．if
C．that
D．which
答案
答案：C
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.