（友情提示：鼠标拖选单词即时翻译） 1.（10福建24）Stephen Hawking believes that earth is unlikely to be the only planet       life has developed gradually. A. that                    B. where                      C. which                   D. whose 2.（10湖南28）I've become good friends with several of the students in my school         I met in the English speech contest last year.      A. who             B. where              C. when             D. which 3.（10江西31） The girl arranged to have piano lessons at the training centre with her sister ______ she would stay for an hour. A where         B who           C which             D what 4.（10山东24.）That’s the new machine ______ parts are too small to be seen.    A. that         B. which         C. whose      D. What