–I think the teacher should give Ted one more chance.

--Yes, it’s not his fault to miss the bus.

A．another

B．another one

C．once

D．one another

宫内节育器的作用机理不包括：（）

A.扩张宫颈

B.阻止受精卵着床

C.抑制排卵

D.阻止精子进入宫腔