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【判断题】
在每一种生物细胞中，染色体的数目是可变的。 [ ]A.
正确
B.
错误
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参考解析：
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【简答题】We learn our culture through p___________, f_______________, a_______________, m_________________. When we are talking about the architecture of the Palace Museum, it means that we are learning our cu...
【单选题】We are cleaning the room ______ they are watching TV .
A.
When
B.
while
C.
as soon as
D.
before
【简答题】We
are watching TV ______ we caught sight of a friend of ours .A. as soon as B. when C. while D. once
【简答题】A．When we are touring around an opera house. B．When we are watching a TV series. C．When we are appreciating background music in a restaurant. D．When we are attending a lecture at college.
【单选题】What ____you ___(do) at that time? We are watching TV.
A.
were, doing
B.
were watching
C.
was, doing;
D.
are watching
【简答题】When we are talking about the architecture of the Palace Museum, it means that we are learning our culture through ____________. And when we are reading books, newspapers, magazines or when we are wat...
【单选题】— What did you do on holilday? — ____________ [ ]
A.
I flew to Beijing.
B.
We are watching TV.
C.
I'm going to go home.
相关题目：
【单选题】We are cleaning the room ______ they are watching TV .
A.
When
B.
while
C.
as soon as
D.
before