若函数$y=\sqrt{3}{\sin }^{2}x+\sin x\cos x-\frac{\sqrt{3}}{2}$的图象关于直线$x=\phi$对称，则$x=\phi$可以为（    ）

    Early this morning we all went to the Future Hall to have our graduation ceremony. The headmaster made a wonderful speech, and many of us ____ (move) to tears.

    Now the ceremony is over. We will leave school soon. I feel very excited because I am one of the best ____ (graduate). At the same time, I am a little sad because I have to say goodbye to my classmates and teachers. I want ____ (take) some photos with them and I will give some gifts to my teachers as well. In the past three years, I ____ (have) a great time in Red Star International School. I have learnt not only how to study, but also how to be a man. In ____ future, I will work much ____ (hard). I hope I can be an astronaut when I ____ (grow) up.

    Maria, Jane and Michael ____(go) back to their hometowns tomorrow and I will see them off at the airport. We will keep in touch ____ each other by sending emails, making telephone calls or writing letters. We will be good friends forever. I wish my classmates and teachers health, ____（happy） and good luck.