-Excuse me.How long can I keep the book?-You can return it by the end of this month.
The girl is at school. __________ is busy with her work.
The teacher asked me ____.
Some polluting factories _____by Beijing government soon in a few months.
My parents will buy a piano for me if I _____ good grades in the tests.
I used to be afraid to speak in front of public before, but recently I _____ a lot.