There was no one visible; under him, in the water, the dim shapes of the swimmers had disappeared. then one, and then another of the boys came up on the far side of the barrier of rock, and he understood that they had swum through some gap or hole in it. he plunged down again. he could see nothing through the stinging salt water but the blank rock. when he came up, the boys were all on the diving rock, preparing to attempt the feat again. which sentences below include only prepositional phrases (no participial or absolute phrases and no dependent clauses)? select all that apply.

  plan: i will begin with a quotation about the importance of unity in a community. then, i will state my claim that an activity will unite our school by creating a shared vision, purpose, and direction. in the body, i will use three main points that describe the different avenues the students can take: through a variety of clubs, through a special event, or through an awareness week. i will provide evidence about other towns that have unity activities and the kinds of events that they include. pictures will illustrate my three main points in action. for the ending, i will restate the main idea in a new way and pose a question to keep the audience thinking. 

there are many stores that have sales right before christmas