阅读下列各小题，根据括号内的汉语提示，用句末括号内的英语单词完成句子，并将答案写在答题卡上的相应题号后。
When I have difficulty with my study and turn to my teachers for help, they are always generous with their time, _________________________. (grateful)
当我学习有困难、向老师们寻求帮助时，他们对于他们的时间总是非常慷慨，对此我非常感激。
Only after this stage of growth _________________________how important all the support is ! (understand)
只有在经历成长的这一阶段后，你才会明白这所有的支持是多么重要！
The disappointing test result put him into the position _________________________to catch up. (decide)
这让人失望的测试结果让他处于决定迎头赶上的处境。
It’s requested that all the students _________________________ while they watch performances in the Arts Centre. (keep)
要求所有的学生在艺术中心观看演出时保持安静。
Ever since he was young, he _________________________those in need. (devote)
从他年轻时起，他就致力于帮助那些有困难的人。
He was so excited, for this was the first time he _________________________ Shi Yigong face to face. (meet)
他是那么激动，因为这是他第一次当面见到施一公。
_________________________, please let me know. (change)
一旦你改变主意，请让我知道。
It must be Taylor Swift, _________________________. (recognize)
这一定是泰勒·斯威夫特，她的声音很容易辨认。
We will never forget the day ______________________ in the morning exercises competition. (win)
我们永远不会忘记我们在广播操比赛中获得一等奖的那天。
There are a lot of society activities in our school, some _____________to play apart in. (encourage)
我们学校有很多的社团活动，我的老师鼓励我参与其中一些（活动）。