-- You seem to be burning yourself out with so much work!-- ______. I'm dying for a thorough rest and a good workout.

Chemical pollution will bring about a threat to agriculture and food chain, and ________ to human health.

There was such a long queue for coffee at the interval that we ____ gave up.

My uncle lost his ID card yesterday. ______, a boy found it and gave it back to him last night. 

Mary had to call a taxi because the box was_______ to carry all the way home.