I don't know ______ tomorrow. Can you tell me? [ ]

A. when we started

B. when did we start

C. when we will start

D. when will we start

生态系统中的消费者（）

A.是异养型微生物

B.是草食动物

C.是肉食动物

D.可起着加工和再生产的作用

E.能用简单的无机物制造有机物