Scientists have obtained more evidence ________ plastic is finding its way into the human body.
what
that
which
where
I didn’t know that he was a cheat, or else I ________________ him.
If he had spent more time practicing speaking English before, he _____ able to speak it much better now.
They must have been enjoying themselves there,or they __________ so long.
Eye doctors recommend that a child's first eye exam ________ at the age of six months old.
—Where are the children? The dinner's going to be completely ruined. —I wish they______always late.