1 . Unaware ________ the danger or risk, some drivers ride their cars after drinking.

A．of

B．to

C．for

D．from

2 . Some parents are ____________ of the danger of allowing their kids to use smart phones. (aware)

3 . My brother was completely _________ of the trouble he had made. （aware）

4 . 那个男孩没有意识到自己的错误。
The boy was _____________________ his mistakes.

5 . 人们之前没有意识到保护环境的重要性，一些物种灭绝了。
Some species ______ ______ because many people ______ ______ of the importance of protecting the environment before.

6 . 有些人还没意识到保持环境清洁的重要性。
Some people ____ ____ ____ the importance of keeping the environment.

7 . —Many students don’t realize how much time they are wasting on computer games.
—I agree with you. As students, we should focus on study.

A．are unaware of

B．look forward to

C．go for a walk

8 . Jack那时完全没有意识到他所惹的麻烦。
At that time, Jack ________ totally ________ the trouble he caused.