城市生活垃圾填埋场产生的气体主要成分是( )。
A．甲烷和二氧化碳
B．甲烷和一氧化碳
C．一氧化碳和二氧化碳
D．甲烷和硫化氢
参考答案：A
根据对话情景，填入恰当的单词，每空一词。
A: What are you doing for 1 ?
B: I'm going to Thailand. I hear Thailand is a good place to go 2 .
A: 3 are you going with?
B: I'm going with my parents.
A: How long are you 4 there?
B: Just for a week.
A: Have 5 .
A: Thanks.
They talked about it for hours. _______ they decided not to go. [ ]
A. Next
B. Finally
C. First
D. Later
