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thatitwasgoingtorain,theydecidedtoworkinsidethehouse.a.knowb.beknowingc.knowingd.toknow为神马

题目详情
___ that it was going to rain,they decided to work inside the house.
a.know b.be knowing
c.knowing d.to know
为神马
▼优质解答
答案和解析
动名词做作状语,表原因,意思是知道要下雨,他们决定在屋里工作.
后面是主句,所以肯定不能选A,A是谓语形式,只能选用动词非谓语形式,B表示现在,D表将来,动词直接加ing就可以做状语的