---Excuse me, sir.Would you do me a favour? --Sure.What is it? ----I _____ if you could tell me how to pronounce this English word.
I didn’t hear the phone. I ________ asleep.
—Does he know how to work out the problem? —Yes,he has ________ a good idea to solve it.
The trip will take about five months;it will be a long time ________ we meet them again.
This kind of medicine has a bad ________on our brains.
The chance I had been looking forward ________ at last.