What is he ________?( )
A:do
B:does
C:doing
人体进行有氧呼吸的主要场所是 ( )
生物的各种形状都是由____ 控制的,形状的遗传实质上是亲代通过____ 把基因传递给了子代。
I told him that he wasn't welcome in my home.