Nowadays teachers feel they can’t help every student ________ suitable reading materials, so they encourage them __________ English on the Internet.
Can you ______ American English from British English?
Please give me a call ______ you arrive in New York.
I don't mind her criticizing me, but ______ is how she does it that I object to.
As a global financial center, Hong Kong serves as the ______ role in the course of Renminbi internationalization.
There is a ______ going on in America public schools over the best way to teach English to foreign students.