The policeman often helps the old woman walk _____________ the bridge.
A:across
B:on
C:in
D:over
揩____ 跤 ____ 恃____ 梭____ 仰____
楷____ 姣____ 待____ 唆____ 抑____
2016年6月25日,我国载人航天工程为发射货运飞船而全新研制的长征七号运载火箭,在海南文昌航天发射场点火升空。回答下列小题
—Yes, ______ I'll call them at once.