(One) This is a...: phone, book, computer, pencil, marker, backpack, balloon, remote control, cd, lamp, pen, (Many) These are...: markers, books, computers, pencils, balloons, cell phones, backpacks, remote controls, cds, lamps, pens,

What's this? / What are these?

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?