Question

Modern science has given clear evidence ______ smoking can lead to many diseases

1. A.
   what
2. B.
   which
3. C.
   that
4. D.
   where

Answer 1

C
试题分析：考查同位语从句。句意：现代科学已经给出了明显的证据，吸烟能够导致许多疾病。从句意可知evidence 后面是同位语从句，从句意思完整，不缺少成分，that 引导同位语从句不做成分，只起连接作用，所以C选项正确。
考点：考查同位语从句。