18. It is that he has passed the examination and I am I will pass it too.A. certain; ce

问题补充：

18. It is that he has passed the examination, and I am I will pass it too.

A. certain; certain

B. certain; sure

C. sure; certainly

D. certainly; surely

答案：

A. certain; certain

(答案→)B. certain; sure

C. sure; certainly

D. certainly; surely

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