They are considering ___ to the countryside to work.

A．to be sent

B．to send

C．being sent

D．sending

重点检重点修标准：消除热轴故障；滚动轴承无甩油，外圈、前盖、轴箱无裂损，密封罩、轴端螺栓无脱出，承载鞍（）、错位。

A、无折断

B、无破损

C、无裂损

D、无磨耗过限