My grandfather is in his eighties, ______he is still in good health.
| A．or | B．but | C．so | D．For |
The teacher told us the earth ________ around the sun.
| A．goes | B．went | C．go | D．will go |
He’s been in China for two years. And he’s used to _______ in China.
| A．lives | B．living | C．to live | D．live |
_______ his help, we finished the work on time.
| A．Thanks for | B．Thank | C．Thanks to | D．Because |
-_____ have you worked? -Since 2 pm.
| A．How soon | B．How long | C．How often | D．How far |
We can’t work out the physics problem. Can you tell us ________?
| A．how to do | B．what to do it | C．how to do it | D．what should to do |