—_______.
A:How do you do?
B:I can help you.
C:May you happy.
D:Good luck to you.
下列地区河流含沙量较小,结冰期较长,农业发达的是( )
松树与桃树相比,最主要的不同之处是( )
—It __________ be him. He has gone to Lanzhou.