()the summer holidays ,I offen work ()a farm A In in B On on

()the summer holidays ,I offen work ()a farm A In in B On on 是on summer holidays还是in summer holidays? work on I work on a farm .1.work 是谓语,on a farm 是状语;2work on是 the hospital i work in sits on a beautifui mountain. The old men work on a farm,they are ( )(farm) I live on a horse farm in Virginia什么意思? ( )the farm I have some ducks 前面该加什么?A.In B.On C.At D.Under My uncle has many ducks____his farm.A in B.on The farmer works ___ the farm ___ Sunday morning.A.in;on B.o live on a farm 还是 live in a farm I often help my grandfather ___ the farm work on holidays.是w I went to Beijing____my last summer holidays.a.about b.on c.