The driver could have survived,  but he ____ the seat belt.
A．had been fasteningB．hadn’t fastened C．was fasteningD．didn’t fasten
D

試題分析：考查時態(tài)。本題陳述過去的事實，故用一般過去時。句意：司機本可以活下來的，但他沒有系安全帶。故D正確。
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