1.B (why dinosaurs suddenly disappeared )做为主语
2.D What is even more important is that+ 从句 (更重要的是...)
3.A that + 从句做表语
4.B 他面临的麻烦是要到哪里去找一份新的工作.
1.B (why dinosaurs suddenly disappeared )做为主语
2.D What is even more important is that+ 从句 (更重要的是...)
3.A that + 从句做表语
4.B 他面临的麻烦是要到哪里去找一份新的工作.