One specific study that addressed this issue was done by Sallis et al.
when they implemented a program called Project SPARK in which it provides
physical activities during class by containing health-fitness activities...
这是一道改错题，有两个问题想向老师请教。
1.when-where，请问老师when是否可以改成that，看做一个同位语从句？
2.containing-including把...纳入，请问老师是否可以直接去掉by，不改containing？
