单项选择题


A．when
B．while
C．time
D．hour
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单项选择题
A．comfortableB．comfortablyC．comfortD．uncomfortable
A．comfortable
B．comfortably
C．comfort
D．uncomfortable
单项选择题
—Lovely day, isn't it— ______ Let's go out for a walk, shall we
A．Yes, it isn't.
B．No, it is.
C．Yes, isn't it
D．No, it isn't.
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