最少用______个相同的三角形可以拼成一个平行四边形．
如图：
至少用2个相同的三角形可以拼成一个平行四边形；
故答案为：2．
根据句意及汉语提示完成单词，使句意完整、正确。
1. Simon and Jack are old enough to look after _____ (自己). Don't worry.
2. What's the _____ (身高) of Yao Ming? Do you know?
3. The teacher was happy because the boy answered all the questions _____ (正确).
4. What an _____ (令人惊奇的) result! I can't believe my ears.
5. There is little time left. Why not _____ (开车) me to school, dad?
薏米素（coixol）
