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【单选题】
下列说法错误的是（ ）A.
命题：“已知 是 上的增函数，若 ，则 ”的逆否命题为真命题
B.
命题 ：“存在 ，使得 ”，则 ：“任意 ，均有 ”
C.
若 且 为假命题，则 、 均为假命题
D.
“ ”是“ ”的充分不必要条件
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举一反三
【单选题】The birth planning policy allows my parents to have a second child because of my disability, but to look after me, they chose ________.
A.
not to do
B.
not to have
C.
not to
D.
to not have one
【单选题】—My parents have ever been to Canada. —Really? When ________ there? [ ]
A.
have they been
B.
will they go
C.
had they been
D.
did they go
【单选题】— My parents have been to Hongkong. — Really? When ______ there? [ ]
A.
have they gone
B.
have they been
C.
did they go
D.
will they go
【单选题】The birth planning policy allows my parents to have a second child because of my disability, but to look after me, they chose .
A.
not to do
B.
not to
C.
not to have
D.
to not have one
【简答题】My parents have eggs and milk for breakfast．（对划线部分提问） your parents_________ for breakfast?
【简答题】My parents _____ (plan ) to have a good weekend last Thursday.
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