初中英语3道小题,求解~急,能解几道算几道,主要是第三小题和第一小题~

初中英语3道小题,求解~急,能解几道算几道,主要是第三小题和第一小题~
1. ( ).The bread that was thrown away just now had a _____ taste.
A .salty B.sour
C .sweet D.crispy
2. In England,nobody under the age of 18 ____(allow) to drink in bars.
3. 他确实是我所教过的学生中最聪明的.
He is _____ _____ the cleverest student I've ever taught.