known
- _______, English is one of the most important subjects.
- ______is known to all, the Amber Room belongs to the Russians.
- An e-pal, as you have known, means a friend ______ you write e-mails.
- How long_________each other before they_________married?—For about a year.
- As is known to us, happiness consists ____ appreciating ____ you have.
- He is ______ is known as a hacker —- he likes to show off on the Internet and attack websites.
- is known to all that Taiwan is part of China and it shall not be separated from the mainland.
- is known to us all, Germany is ______ European country.
- It is known to all that every minute ____ full use of____ the lessons will benefit students a great deal．
- It is known to us __________ it was not until