单选题 27. Make sure you are given a ________ for everything you buy.

单选题 21. --What _____ at 2 p.m. yesterday afternoon?      

--I was sleeping at home. 

单选题 29. We were very _____________ by the standard of work.

单选题 25. You will find volunteer work to be an ____________life experience.

单选题 28. I’ll heat it up in the _________.  

单选题 23. Have you tick ________ Kate’s name on the list?  

单选题 26. They went to Yunnan, ______ they saw beautiful snow mountains.

单选题 24. -- How to deal with a minor burn?    

       -- Cool the ___________ area with running water.