My mother passed the drivingtest at her first attempt. It was all ________ she had been practicing so

hard.[ ]

A. why  

B. because

C. that  

D. what

The nurse is caring for a client with otosclerosis scheduled to undergo a stapedectomy. The client asks the nurse when her hearing will improve. Which response by the nurse is most appropriate ？（）

A．Your hearing may not improve but you'll no longer be bothered by tinnitus.

B．Your hearing may be dramatically improved right after surgery.

C．You may notice improved hearing within 1 to 2 weeks.

D．Your hearing may improve 3 to 6 weeks after surgery.