【2013天津】—I don’t know _____.---Because he has to look after his mother.
--Have you handed in your English homework, Lily? --Of course. Shirly ______ it back to me at the end of this morning reading.
I was about to enter the office ______ I heard someone cry “ Earthquake!” loudly outside.
I am considering buying ______ used car for its lower price.
It is clever ________ you ________ me work out the maths problem.
There is ________ in the classroom, so we can see ________.