1.Though a skilled worker, _____( 他被公司解雇了 ) last week because of the economic crisis.
2.He was disabled from birth, but he never felt frustrated, __( 也从未屈服于任何困难 ).
3.The little boy next door has been beating his drum for a whole morning, which got on my nerves so much __( 以至于我无法集中注意力学习 ).
4.The scientist tried to convince us that a tiger would not attack us __( 除非它走途无路 ).
5.The nation ’ s population continues to rise ______ ( 以每年 1200 万人的速度 )