.Mary is afraid of out at night.

I like flowers. I’m going to buy a house _____ a small garden in front of it．[ ]

You must be tired now. Why not ________ to have a rest?

Why don’t you have a notebook with you ?—I____ it at home this morning.

scientists have done a lot of research on A (H1N1) flu, there are still some cases for further study.[ ]