John’s father went to Nanjing ________ten days ago.
| A．on duty | B．in business |
| C．on business | D．on show |
I will try my best to stop my son from _____ the same mistake.
| A．make | B．made | C．makes | D．making |
–_____ did you work out the problem in such a short time? --With Mr. Li’s help.
| A．When | B．Where | C．How | D．Which |
They walked home last night because they couldn’t _____ to take a taxi.
| A．leave | B．buy | C．afford | D．allow |
–Why didn’t you buy any bread? --Sorry, I _____.
| A．forget | B．forgot | C．remember | D．remembered |
They all _____ Laura about building a museum here.
| A．waited for | B．handed in |
| C．agreed with | D．knocked at |