1.My grandma is kind-hearted .she always has pity ___poor ch
1.My grandma is kind-hearted .she always has pity ___poor children a.on b.for c.with d.to 2. Mum ,could you please tell me ___dad has gone to london 这题为什么不能用how long?
1.on (have pity on sb.表示同情某人) 2.句中gone(go)是瞬间动词,而how long问的是持续性的动作,表示动作持续了多久,瞬间动词不能用how long提问.如果句子是“Mum ,could you please tell me ___dad has BEEN to london”就可以用how long了.楼上说how long表示物体具体长度没错,但是这里句子没有这样的意思.