A:always turned u
B:has always turned u
C:was always turned u
D:was always turning u
Look, some meat ____ in the bag. Some vegetables ____ in the basket. (be)
“坐地日行八万里,巡天遥看一千河”描述的是地球的( )
把﹣5℃的冰投入0℃的水中(周围空气是0℃),过了一段时间,( )