My science teacher told us that the earth around the sun.
Can you take photos with elephants? —- Certainly. ______ elephant is ______ useful animal. I like them.
Sorry, I don’t know the answer ______ the question ______ it is too hard. [ ]
Who’s that boy reading in the garden? Is it David?— It ____________ be David. I saw him in the classroom just now．
_____ is the T-shirt, please?— Five yuan.[ ]