单项选择题
I didn't expect that he would take（）of my failure to achieve his own goal.
A.chance B.effect C.occasion D.advantage
单项选择题 The pioneers（）their journey after a short rest.
单项选择题 When she retired she did a lot of（）work for the Red Cross.
单项选择题 What these young men were doing（）a threat to the safety of the whole neighborhood.
