Having lived in China for 8 years, Helen has a good ____________ of both English and Chinese.

 He tried to _______ his son of the danger of spending more than he earned.

I was completely terrified when I suddenly saw a dark figure leaning ________ the door in front of me.

The shot was well ________ of the goal keeper, _______ the player a chance.

Due to the policy of free highway fees on major holidays, too many passenger cars are trapped on the highways, causing heavy traffic jams, some even _________ for several hours.