--Excuse me, teacher, can I ask you something about the last class? I didn’t quite understand it.
--Sure! Please feel _________to ask me anything!
| A．fine | B．free |
| C．OK | D．right |
You look exhausted. What happened ___________ you?
A. on B. with C. to
The doctor said he was overweight and should pay attention ___________ exercise.
A. to do B. to doing C. do
You can’t take away things that ___________ you.
A. aren’t belong to B. don’t belong C. don’t belong to
–___________ do you visit your grandparents? –Twice a month.
A. How long B. How soon C. How often
He ___________ the volunteer group last year and ___________ many activities since then.
A. took part in…joined B. joined…took part in C. joined…has taken part in