He put forward his suggestion at the meeting that every means to save the crops before th

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(答案→)A. be tried
B. was tried
C. should try
D. tried
解析：考查同位语从句，此同位语从句应用虚拟语气，因为题中的名词为suggestion，后面的同位语从句应用（should ）do 结构，句意：在会议上他提出看了他的建议，就是在暴风雨来临之前每一种方法应该尝试一下拯救庄稼，所以选A。