We all know that，________，the situation will get worse.

A．not if dealt carefully with                    B．if not carefully dealt with

C．not if dealt carefully with                    D．not if carefully dealt with

We all know that，　　　　 ，the situation will get worse.?

A.not if dealt carefully with?　　　　　　　 B.if not carefully dealt with?

C.if dealt not carefully with?　　　　　　　 D.not if carefully dealt with

从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

We all know that, __________, the situation will get worse.

1. A.
   not if dealt carefully with
2. B.
   if not carefully dealt with
3. C.
   if dealt not carefully with
4. D.
   not if carefully dealt with