I was _______ at the letter, which was________ to my classmates.
If you sleep less than seven hours, you are three times more to catch a cold.
Don’t throw away the old books.Give them to ____needs them.
It’s really stupid of you ____ him the news yesterday so that it has been disturbing him all the time.
We used to work in the same office and we____ often have coffee together, which I missed so much years later.
Jane established a program, ____ young people to take part in activities ____ promote greater concern for the environment.