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【單選題】
近年來，北京市大力推廣沼氣作為農村生活能源。沼氣的主要成分是（ ）
A.
甲烷
B.
乙烷
C.
乙烯
D.
一氧化碳
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舉報參考答案：
舉一反三
【單選題】My house _____ when you visited Beijing last time, so I didn’t invite you to my home.
A.
was being decorated
B.
is being decorated
C.
has been decorated
D.
was decorated
【單選題】The old man has retired from the factory. He _____ there for 30 years.
A.
works
B.
worked
C.
has worked
D.
was working
【單選題】She had to drop out of school _____ her family couldn’t afford the cost of her education.
A.
although
B.
unless
C.
because
D.
so
【單選題】The decorations were so lovely that they _____ in a short time.
A.
sold out
B.
has been sold out
C.
were sold out
D.
were selling out
【單選題】What was wrong with Mrs Jenkins?
A.
Something was wrong with her heart.
B.
Something was wrong with her back.
C.
Something was wrong with her foot.
相關題目：
【單選題】My house _____ when you visited Beijing last time, so I didn’t invite you to my home.
A.
was being decorated
B.
is being decorated
C.
has been decorated
D.
was decorated
【單選題】The old man has retired from the factory. He _____ there for 30 years.
A.
works
B.
worked
C.
has worked
D.
was working
【單選題】She had to drop out of school _____ her family couldn’t afford the cost of her education.
A.
although
B.
unless
C.
because
D.
so
【單選題】The decorations were so lovely that they _____ in a short time.
A.
sold out
B.
has been sold out
C.
were sold out
D.
were selling out
【單選題】What was wrong with Mrs Jenkins?
A.
Something was wrong with her heart.
B.
Something was wrong with her back.
C.
Something was wrong with her foot.
參考解析：
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