_____ is necessary for us to finish the work in two days.

The little girl felt upset ____ her pet dog died.  

His mother gets up at 6:00 a. m. every day. She is used to ___ early to make breakfast for the family.

—Why was he late?

—_____ he got up late.  

The soft music sounds ____. We are all listening ____.

Everyone gets these feelings ____ your age.  

A at  B in  C on  D. about

--- Mum，I think I’m ______to get back to school.

---Not really, my dear. You’d better stay at home for another day or two.

The question is ________ more difficult than that one. 

Those poor children really need a house _____. 

____ Mr. Zhang gave us some good suggestions, we still didn’t deal with those problems very well.