■ They say (that)

可以引入一句谚语（they 没有具体所指）。

• They say when you get yourself into a hole, stop digging.常言道，闯了祸，早脱身。

也可以引入一个自己不同意的意见，后面提出不同意见。

• They say a leopard can't change its spots. But...常言道，江山易改，秉性难移。不过…

• crazed
• crazed 与 crazy
• crazy
• credentials
• credible
• credible 与 creditable
• credit
• creditable
• crime
• crime
• crime 与 sin
• critical
• criticism
• criticism of
• criticism 与 critique
• critique
• crocodile
• crop
• crowd
• crowd behaviour
• culture shock
• cure for
• cure of
• cure of 或 cure to, cure for
• cure to