It never occurred to humans until themid-l990s someanimals can be cloned

The boy on the playground ____ be Tom, because he saw him in the library just now.

I’d like to work with ______ is honest and easy to get on with．

The small town is so good a place _____ many people come to visit ____ it has become well known all over the world

Robots are _________ to do the same things _________ people.