．The children are having a good time, ______ with sand, others with toys．
| A．some of them playing | B．some of them are playing |
| C．some of them | D．who playing |
推荐试卷
．The children are having a good time, ______ with sand, others with toys．
| A．some of them playing | B．some of them are playing |
| C．some of them | D．who playing |
试题篮
()
粤公网安备 44130202000953号
