单项选择题
She can run 100 meters in 13 seconds without（）herself.
A.executing B.inserting C.exerting D.devoting
单项选择题 We must（）these trash ideas.
单项选择题 Most parents encourage their children to take an active part in social events,（）those events do not interfere with their studies.
单项选择题 Dogs are often praised for their（）they almost never abandon their masters.
