We find ______ necessary to protect the earth.A.it B.this C.
We find ______ necessary to protect the earth.A.it B.this C.
We find ___ necessary to protect the earth.
we found it necessary to protect the earth 为什么用it 而不是it is
We found___necessary to protect the environment.A.it B.this
i think ___ important to protect our earth.A .thtat B.it C.w
find ____ difficult to do the homework.A:that B:this C:it D:
It is necessary to protect trees from the frost.
A.for;protect B.against;protect C.for;to protect D.to The so
We should do something to protect the earth.to后
The p__ Earth is our home.We should protect it.
It is necessary to have _ test.A.third B.the third C.a third
To protect the Earth,we plant___trees every year.A.million o