It hasn’t been ______ that food from cloned animals is really safe for humans to eat.

When did you meet him?—It was on the day ____his house was broken into.

I’m still wondering which school our son should choose. — him alone, he can make up his mind.

Everyone can _____ and every dollar counts. Please join us and donate some money to help earthquake victims.

In our school library there anumber of books on science and the number of them growinglarger and larger.