问题
Jack said the paper was too hard when he was asked why he failed the exam again..— Well, _____.
A:a bad penny always turns up
B:a bad workman always blames his tools
C:an early bird catches the worm
D:an apple a day keeps the doctor away
B:a bad workman always blames his tools
C:an early bird catches the worm
D:an apple a day keeps the doctor away
正确答案是：
