They keep horses and cattle, the former for riding, ______ for food.

I ______ laughing when my daughter made a face.

______ miss the game, they set out early after supper.

She ______ to Africa to study the animals there, though her family asked her not to.

In many countries, some scientists are already _______ research in order to produce a cloned human baby.

Jessie, my best friend _______ me of some really bad things just to hurt me. I felt betrayed.

        what their friendships are based upon, the important thing to remember is          both of them are friendships.

--- I’m still working on my project.
--- Oh, you will miss the deadline. Time is          .

— Well, Randy is not quite ready to make a decision yet.
— So, ________, we have to wait, right?

The boy went swimming in the deep lake，    his mother's fear for his safety．