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【判断题】
武当山和青城山都是道教名山,有的道教建筑群。( )A.
正确
B.
错误
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【单选题】根据下列文章,请回答 36～40 题。Where Ha ve All the Frogs Gone? In the 1980s, scientists around the world began to notice something strange: Frogs were disappearing. More recent research has shown that many kinds ...
A.
knowledge about fatal human diseases.
B.
knowledge about air and water pollution.
C.
A chance to discover new medicines.
D.
an opportunity to detect poisonous gases.
【简答题】It is difficult for us to learn a lesson in life __________ we’ve actually had that lesson. A．until B．after C．since D．when
【单选题】It is difficult for us to learn a lesson in life __________ we've actually had that lesson. [ ]
A.
when
B.
after
C.
since
D.
until
【单选题】It is difficult for us to learn a lesson in life ______ we’ve actually had that lesson.
A.
until
B.
after
C.
since
D.
when
【单选题】I’ve already told you that the fourth and last part of the article ______ the most difficult to understand.
A.
is
B.
was
C.
are
D.
were
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