When Julio Diaz stepped off the subway after work one night, he was simply planning to go to his favorite local diner for a meal. But when a teenage boy approached him with a knife, Diaz knew the ev
Teens are busy people. They balance high school and friends; some add jobs and extracurricular(课外的) activities to the mix. 36 Involve your teen with a variety of activities from your life a
，则
B．若
，则
D．若
，则 
得
；而由
得
；由
不一定有意义；而
得不到
，故选A。