There were not any track and field ______ for women in the Olympic Games until 1928.

Doubting that the traveler carried drugs, the Customs officer stopped him and _______ his suitcase, but found nothing at all.

When this boy was asked to copy down the sentence ten times, he did nothing but _____deeply with a blank look on his face.

________ have an internal clock that controls the beating of our heart, and the ________ of our breathing.

______of the people on the Net _____ WenZhou will recover from the loan crisis(借贷危机) in time.