30. The police got to _____was once an old school _____ the peasants used as a store.A. what; that B. where; which C. where; that D which; where
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.