2 . — Many people are still wasting water today.
— It’s a pity that they don’t realize the importance of water.

A．be aware

B．be unaware of

C．be fond of

3 . The cooking time ________ the size of the potato. The bigger ones need more time.

A．take care

B．depend on

C．keep in touch with

D．is unaware of

4 . There was a piece of paper on Mike’s back, but he was unaware of it.

A．didn’t realize

B．didn’t write

C．didn’t find

5 . She was completely ________ of the trouble she had made and left without saying a word. (aware)

6 . He was unaware of the trouble he was causing.

A．didn’t realize

B．was unhappy

C．didn’t care

7 . 他并没有意识到当时的危险。
He ________ ________ ________   the danger at that time.

8 . 你一定没留意到小偷，否则钱包不会被偷。
You must ________ ________ ________ the thief, or your wallet couldn’t be stolen.

9 . It’s worrying that some students are ________ of the risk of playing computer games. (aware)

10 . Many young parents don't realize the influence of their actions on the children. (保持句意基本不变)
Many young parents are ________ ________ the influence of their actions on the children.