4 . 阅读下列短文，根据短文内容或括号内所给词的恰当形式填空。
Hi Kelsey,

Happy 18th birthday! You’ve officially reach     1     (adult) in a lot of ways, even though I know you’re already mature beyond your years.

Many bittersweet events will happen in the next ten years. There will be highs. Stick to     2     (cherish) every single second. There will also be lows, and you may feel     3     (dishearten). But you’ll surely be committed to     4     (make) it through, and    5     (gradual) you’ll get stronger than before.

The world will always throw new challenges at you.     6     a consequence, your strength will be tested again and again. Looking back to what has happened over the last decade, I feel proud of how far you’ve come. Approve     7     everything that contributes to your     8     (become) fearless and independent.

As you become an adult, jump at every opportunity     9    comes your way. Celebrate every chance you get. No doubt you’ll always ponder     10    it and make the right decision.

Happy birthday, Kelsey! See you in ten years.

28-­year-­old Kelsey

9 . Besides, finishing the hard race will help us obtain self­-confidence and ________ (motivate), which are essential qualities in our future success. (所给词的适当形式填空)