天然气的化合物组成以甲烷为主，其次为氮气和二氧化碳。
参考答案：错
Sorry, I’ve ________ you. I thought you were finding _____ with me.
A．mistaken; fault
B．mistook; error
C．faulted; mistake
D．mistake; wrong
根据汉语提示，完成句子。
1. They _____ (从不) reads books about love.
2. We _____ (总是) finish our homework on time.
3. Her sister likes music and she often goes to _____ (音乐会)
4. My favorite _____ (小说) is Harry Potter.
5. She play the _____ (钢琴) very well.
