Sixmonthsafterbirth,pandasborninthewildleavetheirmothe...

問題詳情：

 Six months after birth, pandas born in the wild leave their mothers and roam alone in the forests. Not having a fixed place to live, they choose their sleeping spots ____________.

A. in order         B. by coincidence        C. at random         D. on average

【回答】

C

知識點：介詞

題型：選擇題