---- It is said that Tom considered the English exam to be very difficult.

---- I have heard that, but he never studied hard. It is “______”.

A．A burden of one's choice is not felt.

B．Actions speak louder than words.

C．A bad workman always blames his tools.

D．A man of words and not of deeds is like a garden full of weeds.

结构化程序设计主要强调的是

A．程序的规模

B．程序的效率

C．程序设计语言的先进性

D．程序易读性