Today, ____ trees are still being cut down somewhere in the world.
An old man was found ______ in his house. Luckily, he was taken to hospital in time.
The old scientist devoted most of his time __________ the space science.
—Excuse me, Mum. When can we have dinner? —Not until it in half an hour.
— Do you know whose magazine is it? — I think itbe Lily’s, for we can find her name on the cover.
I believe her acting skills will become better in the future.