On his way to the airport，it ________him all of a sudden that he had forgotten his passport. 

The order of DNA chemicals ________ whether a child has her mother’s eyes or her father’s smile.

As soon as the crew(船员) were attacked, the police _________to look into the matter.

I tried to call up my relatives in Kyrgyzstan where an unrest(动乱) was going on, but couldn’t _________.

— David, your application for a loan has _____.  —Thank goodness! I badly need it now.