Use ihe correct form of the word given to complete each sentence

25-28. Use ihe correct form of the word given to complete each sentence.
25. They were very__________about the operation. (doubt)
26. The vase is really__________. You shouldn't sell it. (value)
27. He apologized to her for his__________. (understand)
28. She has been working as a_________for 10 years.(reception)
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