Passage 3Questions 11 to 15 are based on the following passage: Chokwe Selassie is on a mission to help drivers avoid potholes(路面坑洼). The Eight-grader was inspired to kick off his mission on a recent
Passage 1Questions 1 to 5 are based on the following passage: As the National Park Service celebrate its 100th anniversary(周年纪念), President Barack Obama has announced the establishment of one new nat