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。
