Before going abroad,he devoted all the time he could ________ his spoken English.
Nobody but doctors or nurses and those ____ by Dr Hu ____ to enter the patient’s room.
Zhu Zhiwen,________ grassroot singer,was ________ real hit in 2012.
You’d better tell your mother not to make a call while driving because her car __ missed a cyclist when she was on the way to work the other day.
It wasn’t until near the end of the letter ______ she mentioned her own plan.