A, their
the men brought their own tools
the undercover agent still investigating the case is a run-on sentence
It is the evening of August 6. After 12 hours of post-bomb suffering, a Japanese naval launch moves slowly down the seven rivers of Hiroshima, stopping at strategic spots. A young naval officer in a neat uniform announces that there is hope and that the people should be patient because help — a naval hospital ship — is coming. The survivors breathe easier knowing help is on the way.
The sentence which most improve the sentence by adding description is this: 'there are plenty of vegetables, flowers, and plants at the community garden where I work. This sentence is descriptive in nature and tell us some of the charactersitics of the place where the speaker works.