用所给词的适当形式填空。每词限用一次。

      not plan,  solve,  enjoy,  write,  fill,  discover 

1.Laura usually {#blank#}1{#/blank#} beautiful music to get relaxed.

2.Be careful! She   {#blank#}2{#/blank#} the cup with hot water.

3.In the future, humans  {#blank#}3{#/blank#}  more secrets of nature.

4.To our surprise, the problem {#blank#}4{#/blank#} by the expert three days ago.

5.  {#blank#}5{#/blank#} to your parents is a good way to communicate with them.

6.—Where are you going on vacation this summer?

— I {#blank#}6{#/blank#}  it yet. 

-- It depends          when I will have free time.

(Here is a mom's letter to her son.)

Dear son,

    When I grow old one day, please{#blank#}1{#/blank#}me and try to understand me. Don't{#blank#}2{#/blank#}some of my behaviors(行为). If I make a(n){#blank#}3{#/blank#}when eating, please clean it up. If I can't dress myself, please help me. If I say something again and again, please listen to me. {#blank#}4{#/blank#}you were a kid, I read you the same story over and over again. If I can't walk, please{#blank#}5{#/blank#}me your hand. I did the same thing for you when you were learning to walk, When I am{#blank#}6{#/blank#}, you should look after me well. I can only {#blank#}7{#/blank#}you. I have no one else. I looked after you, so in the future it's{#blank#}8{#/blank#}that you look after me.

    I love you, son!

    Your mom, 

Linda Brown