311.Mistakes don't just happen;they occur for a reason.Find out the reason and then making the mistake becomes _______.
A.favourable
B.precious
C.essential
D.worthwhile
312.If I find someone who looks like the suspect,my _____ reaction will be to tell the police.
A.physical
B.immediate
C.sensitive
D.sudden
311.答案是D；favourable 有利的，赞同的；precious 珍贵的；essential 本质的；worthwhile 值得的，有价值的。此句表示犯错误是值得的。
312.答案是B；physical身体的；immediate立刻的，马上的；sentitive敏感的；sudden突然的；根据词义和语境，即刻做出反应。
