A．They have to work harder at work．
B．They can fill in any vacancy in a company．
C．They will be popular for a long time．
D．They could be special in a company．
A．Make a joke about it and move on．
B．Explain why and how it happens．
C．Keep calm, apologize and continue．
D．Pretend not to notice it and go on．
A．He made roller skates．
B．He made shoes．
C．He made musical instruments．
D．He made wheels．