() 始终是中国革命、建设、改革的根本问题。
A．工业化问题
B．“三农”问题
C．城市化问题
D．现代化问题
参考答案：A
Peter _______ fastest in our class.[ ]
A. swim
B. swims
C. swimming
D. swum
He knows little of packing, and ( ) of payment.
A．still less
B．no less
C．still more
D．even more
