下列句子中语意不明，存在语病的是哪几句?（     ）

①“有偿新闻”应当受到严肃批评，这是极其错误的，至少可以举出三点

② 公安局掌握着北平暗藏敌特的名单，优先抓捕这些暗藏的敌特，发现一个抓一个。

③ 荆头山农场正确地对待用户批评，实事求是，不以玉掩瑕。

④ 限于技术设备，古生物遗骸不得不送到外国去鉴定，不仅耗时费钱，还得看人家脸色屈就。

从方框中选择最佳选项完成对话，有两项多余。

A. It doesn't hurt any more.

B. When did it happen?

C. Was it serious?

D. How careless!

E. I'm sorry to hear that.

F. I hurt my finger when I was cutting a watermelon.

G. Do you know how to give first aid?

A: I had an accident yesterday.

B: ____ How did it happen?

A: ____

B: Bad luck! ____

A: No, but my finger hurt!

B: How do you feel now?

A: Much better. ____

B: You must be careful when you use a knife next time.

A: I will. My mother and father had warned me, but I didn't listen.

B: ____

A: Er, I won't cut watermelons with knives anymore.

B: Oh, don't be scared. It's OK if you're careful.