We all know it's （1）

important

important

（importance） to have dreams.However，to make the dreams come true is not an easy thing.A young Dutch man named Boyan Slat enjoys working hard to make his dreams （2）

come

come

（come） true.
   When Boyan was 16，he went diving（潛水） in Greece.He was shocked to see more plastic（塑料的） bags than fish in the sea.The boy wanted to clean up the ocean.However，everyone told him that there was nothing he could do if plastic bags went into the ocean.The teenager didn't give up.He （3）

spent

spent

（spend） several months studying plastic pollution.Finally，he came up （4）

with

with

a science project—use floating barriers（漂浮的屏障） to collect the waste.That is to say "instead of （5）

using

using

（use）nets and ships to collect the plastic bags"，the barriers can make the plastic bags come together with the help of natural ocean currents（水流） and winds.What's more，the collected plastic bags can be recycled（回收利用） and made into products or oil.
   Boyan won prizes for the project，（6）

but

but

that was not enough for him.In 2013，he （7）

set

set

（set） up The Ocean Cleanup.Together with scientists，engineers and （8）

volunteers

volunteers

（volunteer） from all around the world，the young man is working hard to c（9）

lean

lean

up the ocean and make our world a （10）

better

better

（good） place.Would you like to j（11）

oin

oin

them？