To protect the Earth,we plant___trees every year.A.million of B.millions C.million
问题描述：
To protect the Earth,we plant___trees every year.A.million of B.millions C.million
D.millions of
2.It's impoetant for us to protect the Earth____we have only one Earth.
A.because B.because of C.why D.so原因!
答
1,选D
表示不具体的数量,用 millions of 数以百万的
为了保护地球,我们种了数以百万的树.
2,选A
表示原因,后面还是一个句子,用because
答案保证准确的,