China's GDP grew by 7.1 percent in the first half of this year, _______ proved its proactive macro-economic policies were effective
The farm _______once we worked has changed a lot.
I have no doubt ______ she will come out first in the English contest.
Her teacher helped her so much that she bought him a beautiful pen _________.
His disappearance(失踪)______ by the police.
The government tried ____ they could ____ the people in Yushu