来自苏琪的问题
Ifthenewsafetysystem_______touse,theaccidentwouldneverhavehappened.()A.hadbeenputB.wereputC.shouldbeputD.wouldbeput
Ifthenewsafetysystem_______touse,theaccidentwouldneverhavehappened.()
A.hadbeenput
B.wereput
C.shouldbeput
D.wouldbeput
1回答
2020-02-10 16:15