单项选择题
22（）
A．careful
B．slow
C．fast
D．appropriate
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单项选择题
21（）
A．At
B．To
C．On
D．In -
单项选择题
This is an old photograph of me when I ______.
A．have short hairs
B．had short hairs
C．have short hair
D．had short hair -
单项选择题
One of the professor's greatest attributes is ______. ( )
A．when he gives lectures
B．how in the manner that he lectures
C．the way to give lectures
D．his ability to lecture
