It’s 10 o’clock now. I must go.—It’s raining outside. Don’t leave ________ it stops. [ ]

The computer is ______useful tool in _______world today.

________ seems that Mary has known that bad news.

I am often weak and tired when I work. — _________ you have too much pressure. You’d better relax.

Do you like to study mathematics?—____? I like it very much.