— Do you believe there are aliens?

— I’m afraid not. I don’t think aliens       in space.

A. can find     B. can found    C. can be found    D. can be founded

— Do you believe there are aliens?

— I’m afraid not. I don’t think aliens       in space.

1. A.
   can find
2. B.
   can found
3. C.
   can be found
4. D.
   can be founded

— Do you believe there are aliens?
— I’m afraid not. I don’t think aliens       in space.

--Do you believe there are aliens?

--I'm afraid not．I don't think aliens           in space．

A．can find               B．can be found           C．can be founded       D．can't be found