He admits that more work needs to be done to _______ the strategy, and ensure that it’s safe.
A.
certify
B.
establish
C.
prove
D.
validate
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参考答案:
举一反三
【简答题】( Miss Yu is giving a class. Suddenly some bottles drop out of a student’s desk. ) T: What’s the noise there?. S: Sorry, Miss Yu. 1 T: (Walking over to take a look) Oh, so many bottles. S: I’m collect...