Was it in the beautiful park _________was located by the sea ______you first met your new English teacher?

比较下列句子中“其”的意义和用法，判断正确的一项是 （ ） ① 鹏之背，不知其几千里也 ② 吾其还也③ 天之苍苍，其正色邪其远而无所至极邪 ④ 越国以鄙远，君知其难也

hese doctors and nurses tired, Mr. Smith —Yes. ________. They have been operating on thepatient for at least 10 hours.

This is _____ eraser and that’s _____ gold(黄金) ring.

____________better ways for digging tunnels__________,the first railway tunnel under the River Thames was dugin 1884.