问题 填空题 根据图片完成句子。1. — Where does the _____________ come from? — It comes from the _____________ .2. — Where does the _____________ come from? — It comes from the _____________ .3. — Where does the _____________ come from? — It comes from the _____________ .4. — Where does the _____________ come from? — It comes from the _____________ .5. — Where does the _____________ come from? — It comes from the _____________ . 答案 1. rain; cloud 2. desk; tree 3. bread; flour 4. flour; wheat 5. cloud; vapour