A survey has shown that 40% of those killed in traffic accidents _____ if they had been wearing seat belts.
A.should have been saved | B.must have been saved |
C.need have been saved | D.could have been saved |
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A survey has shown that 40% of those killed in traffic accidents _____ if they had been wearing seat belts.
A.should have been saved | B.must have been saved |
C.need have been saved | D.could have been saved |