Are you facing a situation that looks impossible to fix?

    In 1969,the pollution was terrible along the Cuyahoga River Cleveland, Ohio. It____(be) unimaginable that it could ever be cleaned up. The river was so polluted that it____(actual) caught fire and burned. Now, years later, this river is one of____most outstanding（杰出的）examples of environmental cleanup.

    But the river wasn't changed in a few days____even a few months. It took years of work ____(reduce) the industrial pollution and clean the water. Finally, that hard work paid off and now the water in the river is____(clean) than ever.

    Maybe you are facing an impossible situation. Maybe you leave a habit____is driving your family crazy. Possibly you drink too much or don't know how to control your credit card use. When you face such an impossible situation, don't you want a quick fix and something to change immediately?

    While there are____(amaze) stories of instant transformation, for most of us the____(change) are gradual and require a lot of effort and work, like cleaning up a polluted river. Just be ____(patience).

下列各说法中，错误的是（　　）

已知$△ABC$中，$AC=2\sqrt{2}$，$BC=2$则$A$角的取值范围是（   ）

秦灭六国的先后顺序是：①韩；②赵；③魏；④燕；⑤楚；⑥齐

已知向量$\overrightarrow{a}$= (1,2 ), $\overrightarrow{b}$= (2,-3 )，若向量$\overrightarrow{c}$满足($\overrightarrow{c}$+$\overrightarrow{a}$)//$\overrightarrow{b}$,$\overrightarrow{c}$⊥($\overrightarrow{a}$+$\overrightarrow{b}$),则$\overrightarrow{c}$=（   ）