People appreciate _______ with him because he is knowledgeable and humorous.
正确答案： A
本题解析：
appreciate doing sth. 愿意，喜欢做某事。句意：人们喜欢同他交谈是因为他既博学又幽默。
The wounded soldiers would recover quickly if they were well ________.
_______ at all is worth doing well.