C-4:clamp down on 取缔

A:It's said that the goverment will clamp down on the new policy.

A:据说政府要取缔那项新政策了。

B:Are you sure of that?

B:你敢肯定吗?

A:I am not certain about it.

A:我也不确信这个消息。

B:They may have some difficulty in doing it.

B：政府那么做可能很困难。