Both the Winter and Summer Olympics are held ___________on a regular basis.
| A．every four years | B．four years |
| C．for four years | D．every fourth year |
He is only too ready to help others, seldom, _____ , refusing them when they turn to him.
| A．if not | B．if never | C．if any | D．if ever |
---If you like,I can give you a ride home.
---That’s a very kind _____ .
| A．offer | B．point | C．suggestion | D．service |
_____ going to the program “If you are the one”, he was rather concerned about being turned down in public.
| A．Much as he liked | B．However he liked |
| C．As he liked much | D．As much he liked |
---I came all the way to inform you of the time and place of the meeting.
---You could have _____ yourself the trouble.
| A．shared | B．spared | C．cost | D．removed |
The fact has worried many scientists _____ the earth is becoming warmer and warmer these years.
| A．which | B．that | C．as | D．what |