---Why are you so happy?--- ______ the teacher’s help, I found the answer ______ the question.
The Changjiang River is _________in the world.
Daniel is my friend. I like to share my with him when 1 am happy.
--- is your pencil ? ---It’s blue and white .
下面字母中既是英文字母,又是英文单词的是 。
不明飞行物的英文缩写是 。