题目

鸟类的生殖方式是（    ）   A、卵生、体内发育    B、卵生、体外发育   C、胎生、体外发育    D、胎生、体内发育 答案：A______ is known to all, China will he an ______ and powerful country in 20 or 30 years' time.A.That, advancingB.This, advancingC.As, advancedD.It, advancing