He feels great (anxious) ________ about his mother's illness.
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I must make a sincere and humble (apologize) ________to you for being unable to fulfill the task as required.
Food and drinks in China are on offer at very (appetize) ________prices.
The (apply) ________of new scientific discoveries to industrial production usually increase productivities.
He was (appoint) ________as the general manager of the company.