To our ______ , Frank’s illness proved not to be as serious as we had feared.

forget

At the APEC Summit held in Yokohama, Japan, Asia­Pacific leaders addressed ________ over global growth, regional economic development and emerging markets.

The situation put us at a serious________，which made us very worried.

After a careful survey about the cause of the newly-built bridge, they finally came to a(n) _________ that it was due to the heavy rain.