用出芽的马铃薯块茎进行繁殖属于（　　）

A．营养生殖

B．出芽生殖

C．孢子生殖

D．有性生殖

Only by practicing a lot _____ our English well enough to communicate with foreigners.

A．we can learn

B．can we learn

C．learn we

D．we learn