Writing
Task 1
综合写作
【主题】There are too many Asian carps in the Great Lakes, which will damage the local environment.
Reading：3 ways to prevent：(1) build walls, prevent carps from entering the lakes;(2) use electrical devices to sting the fish and drive them back;(3) use toxic chemicals to kill the fish, and then reintroduce the native species to the lakes.
Listening：Refution ：(1) seems to work, but factories near the lakes use ships to carry cargoes. It will cost a lot to unload cargoes on one side of the wall, and then reload them on the other side; (2) seems to work, but small fish would swim through the device, grow up and reproduce in the lakes;(3) unpredictable dangers, cannot ensure not to pollute the lakes in the future.
Task 2
独立写作
Some people prefer to buy new technological devices immediately when they become available. Others prefer to wait until many people have adopted them. Which way do you prefer?