Some researchers believe that there is no doubt______a cure for AIDS will be found.

Fei Junlong’s wife and his child ________ to see him off before the launch, but they failed because of the rules

When the man with a scar came into the café I noticed a ______ look come over the waitress face although she did not say anything.

The police came running and thecrowd.

Lao She is one of _____________ of the twentieth century.