[4끊어말하기] TOEFL Reading : Seagrasses 2  

2. paragraph

The (        ) slowing of (         )wave action and (         )currents means 

that (        )seagrass beds tend to accumulate (         )sediment.

However, 

this is not universal 

and depends 

on the (         )currents 

under which the (         ) bed exists.

Seagrass beds 

under the influence of (           )strong currents 

tend to have many of the (          )lighter particles, 

including (          )seagrass debris, 

moved out, 

whereas (          ) beds 

in weak (         ) current areas 

accumulate (            ) lighter detrital material. 

It is interesting 

that (              ) temperate seagrass beds accumulate (           ) sediments 

from (          ) sources outside (          ) the beds, 

whereas (         ) tropical seagrass beds 

derive most of their (          ) sediments from within.