单项选择题A.a shop.B.a university campus.C.a library.D.an airport.
填空题indicates
单项选择题A.anemia.B.shingles.C.hepatitis.D.HIV.
单项选择题A.we lose a day.B.we add 24 hours.C.we gain 12 hours.D.we add an extra month.
单项选择题A.blue.B.green.C.white.D.red.