Why couldn’t they meet us at five o’clock—Because they were delayed by _________

Life is like ________ ocean; Only ________strong-willed can reach the other shore.

Little John felt the bag, curious to know what it ______.

___ countless failures, the scientist finally succeeded in discovering the chemical substance. [ ]

The online exposure of the diary of a government official made the public realize the extent ______ the Internet affects the society