It is Tim, my best friend in my childhood, who tells me he always dreams of ______ for him to go to Shanghai to study and live there.

．— I wonder if you _______ a picnic tomorrow.— Yes. But if it ______, we’ll visit the museum instead.

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

Being determined is a good quality and that’s _____it takes to do anything well.

I’d like ______ your brother.