英语 六年级 选择题 标准 ★ 精品 重点句型运用 — 英语选择题 人教版·英语（PEP） Unit 4 Then and Now AI 三重审校通过 题目 选词填空：Ten years ago, my grandpa ______ (could / couldn't) swim, so he never went into the river. Now he swims every morning and he is very healthy. A. could B. couldn't C. can D. can't 登录后查看答案与解析 用此考点生成试卷 更多英语选择题