外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.

外研版三年级起点(陈琳主编) - 六年级下册 - Unit 1 He spent about twenty-one hours in space.