Many lifestyle patterns do such ______ great harm to health that they actually speed up _____ weakening of the human body.
| A．a; / | B．a; the | C．/; the | D．/; / |
I don't think the experiment is __________ failure. At least we have gained __________ experience for future success.
| A．/;the |
| B．a；the |
| C．/；/ |
| D．a；/ |
The party last night was __________ big success and all the people present had __________ great fun.
| A．a;a |
| B．/;a |
| C．a;/ |
| D．/；/ |
The two sportsmen congratulated each other __________ winning the match by shaking hands.
| A．with |
| B．on |
| C．in |
| D．to |
The development of the city's industry __________ its environment pollution.
| A．has added up |
| B．has added to |
| C．has added up to |
| D．was added to |
He has worked __________ the maths problem for nearly an hour but he simply can't work it __________.
| A．on；at |
| B．on；out |
| C．at；up |
| D．for；out |