Hãy điền vào chỗ trống với a hoặc an nếu cần
- I had................very bad night. I didn't sleep..............wink
- He is.............vegetarian so he doesn't eat...........meat or .............fish
- Do you take...............sugar in...............coffee?
- My neighbor is ..................photographer. Let's ask him for ............advice
- We'd better go by...................taxi. If we can get................taxi at such...............hour as 2 a.m
- I have...............hour and.............half for lunch
- I have ..................headache and...................sore-throat. I think I've got..............cold
- I hope you have .........lonely time and.........good weather