📝 字母掌握小测
得分 0 / 5
1. Which letter does this lesson focus on?
本课是第 21 课，核心字母是 Uu。
2. Which word starts with letter Uu?
本课的首个核心单词是 umbrella（雨伞）。
3. Complete the sentence: "Uu is for ______"
绘本第二句是：Uu is for under（在……下面）。
4. Which of these words is NOT in this lesson?
本课的三个字母词是 umbrella、under 和 up。
5. What is the third word learned with Uu?
第三个核心词是 up（向上）。
