我想请教两个问题:
1.The scientists have made an _____ study of the viruses that cause the disease.
A. exhausted B. exhausting C. exhaustive D. exhaustion
2.We_____meet there every Sunday,before they closed the park.
A could B would C might D should
第一题选C我明白 但为什么不能选B 译成令人疲惫 的研究
第二题A 为什么 其他那几个为什么不对