After the summer vacation, the professor, together with his fellow teachers, ______ the scientific experiment
| A．goes down | B．go down | C．gets down to | D．get down to |
Taking _______exercises regularly will do good to our health .
| A．physical | B．stubborn | C．legal | D．fluent |
It is my ______to check that all doors and windows are locked after everybody leaves .
| A．doubt | B．poster | C．responsibility | D．evidence |
We all know that the Great Britain will ______the Olympic Games in 2012.
| A．charge | B．volunteer | C．admit | D．host |
We drew this conclusion on the _______of research and experments .
| A．motto | B．glory | C．basis | D．style |
A new ______bus service to Tianjin Airport started to operate two months ago .
| A．regular | B．physical | C．usual | D．former |