从A、B、C、D四个选项中选出-个最佳答案。
21.look at the photo. The girl beside ______ is Nancy.
A.I B.me C.my D.mine
22. I tried several sweaters on,but ______ of them fitted me.
A．both B．eith C. None D.neither
23. Susan will not arrive at the airport on time _____ she hurries up.
A．unless B.if C.when D.while
24. Last year,Li Tong,a college student,_____ to join The Happy Summer Camp.
A. is choosing B. is chosen C.was chosen D.was choosing
