Only when _________________________.
| A．did he arrive the meeting began |
| B．he arrived the meeting began. |
| C．did he arrive did the meeting begin. |
| D．he arrived did the meeting begin. |
29．The young man，who by thenadmission to university，decided to do some part-time jobs to gain more practical experience．
| A．gained | B．was gaining | C．has gained | D．had gained |
28．—Now some parents deny_______to their children，and have become their slaves．
—But this problem does not cause concern of the whole society．
| A．nothing | B．everything | C．something | D．Anything |
27．Don’t you think it essential that every resident of Nanjing___________spare no effort to make contributions to Nanjing 2014 Youth Olympic Games?
| A．should | B．will | C．shall | D．Would |
26．Before selecting the curtain for your newly-decorated house，it’s important to know what colors look great _________the wall paper．
| A．on | B．with | C．in | D．Against |
25．If water becomes increasingly scarce in decades__________，water shortage will become a hot issue all over the world．
| A．coming | B．having come | C．to come | D．to be coming |