A lot of the waste thrown away in the U.S. __________ being shipped overseas to China, India, and other developing countries.
Professor Smith ___ China yesterday.
I’m writing to you and ask whether you’d like to give us ___ how to learn English.
I wonder why he hasn't __ any of my letters for such a long time.
--Look! John is ___. Let’s go and see if he needs any help. A, out of the breath B. out of breath C. out of his breath D. out of breathes
It's dark, Mum ___ be waiting for my return.