一Becareful ,you will make mistakes in yourexams.—I know that，Mum. One can never be too careful.

___to go shopping that Saturday, butthe bad weather made me change my mind

(2013·高考陕西卷)It remains to be seen________the newly formed committee’s policy can be put into practice.

Cathy, can you answer the door I _____ the chair.—I’m coming, Dad.

Bill had to get into his house ___________the window because he left his key in the office.