—If I were you, I ______ for it last night instead of watching movies.
A:would prepare
B:prepared
C:had prepared
D:would have prepared
它们一共搬了多少根木头?
____(____)____=____(根)
口答:它们一共搬了____根木头。
卵生动物和胎生动物的主要区别是( )
下列地理事物与其特征表述正确的是