现在进行时描述活动 — 英语选择题
题目
现在,活动室里Kate在唱歌,没有跳舞;Jack和Sam在下棋,没有看书。哪句话正确描述了他们正在做的事?A. Kate is singing, and Jack and Sam are playing chess. B. Kate is dancing, and Jack and Sam are playing chess. C. Kate is singing, and Jack and Sam are reading. D. Kate sings, and Jack and Sam play chess.