A survey has shown that 40% of those killed in traffic accidents if they had bee
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(2013·浙江金华二模)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 |
试题答案
D
解析