11. Animal experiments will continue to be necessary to resolve existing medical problems __________( 盡管一些人公開反對 ).
12. Professor Clark was a bit strict with us, __________(( 但我們確實從他那里學到了很多 ).
13. The more you explain,__________(( 我愈糊涂 ).
14. He has done so much for the poor in his community that __________(( 再怎么贊揚他都不過分 ).
15. Since my childhood I have found that __________(( 沒有什么比讀書對我更有吸引力 )