The teacher apologized          late.

A．to his students to arrive

B．to his students for arriving

C．at his students to arrive

D．at his students for arriving

随着二代温室的推广，温室采光和保温性能的改进，一大茬辣椒育苗右提前到10月上旬，元月上中旬种植，3月上旬开始采收。