You can go out, _________you promise to be back before 11 o'clock.
| A．as far as | B．so far as | C．when | D．so long as |
It is very cold in the northeast of China ___ winter.
| A．at | B．in | C．for | D．till |
John lives ___ No. 104 Nanjing Road.
| A．on | B．at | C．by | D．with |
Steve and Jane are both very good ___ chemistry.
| A．at | B．for | C．in | D．on |
Do you often help your father ___ the farm work during the summer vacation?
| A．for | B．on | C．in | D．with |
They sometimes go on working ___ the light of the moon.
| A．on | B．under | C．by | D．for |