_______cloning human embryos is not legal in many countries, some scientists are already pushing ahead with research in order to produce a cloned human baby.
—— Have you ever seen a whale alive? —— Yes, I’ve seen ___.
____four years since I joined the army.
We had to be patient because it___some time ___we got the full results.
He lived in poverty, and he couldn’t help ___.
I took ___for granted that he would believe in us.