The living standard of the people in China, _______ is shown in the report, has improved over the past decades.
| A．what | B．which | C．as | D．who |
28.“When did he leave the classroom?” “He left _______ you turned back to write on the blackboard.”
| A．the time | B．the moment | C．until | D．since |
27. “Shall Mary come and play computer games?”
“No, _______ she has finished her homework.”
| A．when | B．since | C．unless | D．as soon as |
26. The visitor asked to have his picture taken _______ stood the famous tower.
| A．that | B．at which | C．when | D．where |
25. “I’m going to the post office.” “_______ you’re there, can you get me some stamps?”
| A．As | B．While | C．Because | D．If |
24. “May I go and play with Dick this afternoon, Mum?” “No, you can’t go out _______ your work is being done.”
| A．before | B．until | C．as | D．the moment |