They will fire a special gun which __________(carry) a rope from the lifeboat to the sinking ship.

问题描述:

They will fire a special gun which __________(carry) a rope from the lifeboat to the sinking ship.

They will fire a special gun which _____carries_____(carry) a rope from the lifeboat to the sinking ship.不能用carrying吗?不能,那样的话定语从句中就没有谓语动词了。