$\frac{4}{7}\times \frac{7}{4}$ =____ $\left(8+\frac{9}{4}\right)÷4$ =____ $\frac{3}{8}\times 6$ =____

$4-\frac{3}{4}-\frac{1}{4}$ =____0.2×20％=____ $1÷\frac{1}{3}-\frac{1}{3}÷1$ =____

    My dad really likes gardening, so he built a 1in our yard. He plants a lot of 2 and this year we have onions, beans, cabbages, tomatoes, potatoes and carrots. Now, we are starting to grow fruits3 grapes, strawberries and pears.

    Growing plants isn't that easy. First, we have to 4 seeds(种子), which we buy at a store called “Garden Nursery”. Next, we turn the soil(土壤) over, and then 5the seeds. We then wait until the seeds come out from the soil and grow into little leaves. My father and I water them every day. We have to do this 6 vegetables are just like us—they need water, air and food, so they can grow better and more 7.

    Autumn is the season to 8. The garden gives us a lot of fresh vegetables and fruits to eat. We may 9 get some vegetables that we cannot get at the supermarket.

    With time and hard work, I have learned to take care of the plants in our garden. It is really a great 10.

已知函数$f\left(x\right)=\left\{\begin{array}{c}x+1,x\ge 0\\ x^2,x<0\end{array}\right.$，则ff（﹣2）的值为（　　）