She had just finished her homework_________her mother asked her topractice playing the piano yester-day.
| A．when | B．while | C．after | D．since |
（2012江苏卷）The notice came around two in the afternoon the meeting would be postponed.
| A．when | B．that | C．whether | D．how |
（2012浙江卷）I made a promise to myself______ this year, my first year in high school, would be different.
| A．whether | B．what | C．that | D．how |
Evdence has been found through years of study______ children’s early sleeping problem likely to continue when they grow up.
| A．why | B．how | C．whether | D．that |
Everyone in the village is very friendly. It doesn't matter ____ you have lived there for a short or a long time.
| A．why | B．how | C．whether | D．when |
（2012江西卷）It suddenly occurred to him he had left his keys in the office.
| A．whether | B．where | C．which | D．that |