---Are you still busy?---Yes, I ____ my work, and it won’t take long.

A．just finish

B．am just finishing

C．have just finished

D．am just going to finish.

掐去植物枝条的顶端，这根枝条不能继续往上生长，是因为破坏了 [ ]

A．输导组织

B．营养组织

C．分生组织

D．保护组织