Their belief is proved by the fact that the death penalty prevents murder.
You ______ further into this matter. If so, you ______ know who did it now.
The trick of the swindler(骗子) ______, the old man avoided being cheated.
Jimson found the map of great value when ______ Beijing.
His suggestion that a new teaching method ______ to arouse students’ interest in study is necessary.
Among so many scientists in this field, he ______ and achieved great success.