If the firms failed to make enough money,they would______.

A．close down

B．call off

C．turn down

D．set off

( )对于“虚心使人进步，骄傲使人落后”相当于“有志者事竟成”对于( )

A．“皇天不负有心人”“失败是成功之母”
B．“吃一堑，长一智”“打破沙锅问到底”
C．“先天下之忧而忧，后天下之乐而乐”“世界上怕就怕‘认真’两字”
D．“满招损，谦受益” “天下无难事，只怕有心人”