We have been trying to train the young people who were hired last month but they ______ their best to learn.

(单选题)It can be inferred from the passage that public services ___ (单选题)The joke about doctors implies that, in the eyes of nurses, (单选题)To make your humor work, you should ______. (单选题)Which of the following about the boy is WRONG? (单选题)When the boy finally told his father that all the nails were (单选题)Underlined expression “dwindled down” means ______. (单选题)When the boy lost his temper, he must ______ as his father t (单选题)What is the author’s attitude towards the Vikings? (单选题)What is the main topic discussed in this passage? (单选题)All the following belong to the Viking’s achievement EXCEPT