单选题 An outstanding speaker, Mr. Fredrick Douglas, is said to have attributed his success to his ___ speech.

单选题 Lois and her husband decided to share all the housework and they will see to their cooking of the three meals on ___ day.

单选题 State government provided employment and training services for workers and compensation for those who are ___ out of work.

单选题 The broad aim of the conference was that experts working in the same technical area should meet to exchange ___

单选题 Clark became aware that he had lost his audience since he had not been able to talk ___ around on one topic.

单选题 In paragraph3, the underlined word "it" refers to ____

单选题 The word prey in paragraph 2 is closest in meaning to____。

单选题 Rescue workers continued the delicate task of sifting through tons of concrete and ___ to try to reach possible survivors.

单选题 A decades years ago, the American government ___ most of the railroad passenger routes from private company which were losing money on passenger service.