---Excuse me, could you tell me _______?---Sorry, sir. I wasn't there at that time.A. how did the accident happenB. how the accident happenedC. how does the accident happen
When ____________ Mary ____________ to school?
Are you ____________ music?
We should learn ____________ each other.
She isn’ t good ___________ maths. Could you help her __________ her maths?
What do you have ____________ supper?